Common Weakness Enumeration

CWE-611

Allowed

Improper Restriction of XML External Entity Reference

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

1699 vulnerabilities reference this CWE, most recent first.

GHSA-JVJM-J945-8QWC

Vulnerability from github – Published: 2022-05-24 17:33 – Updated: 2023-10-27 13:11
VLAI
Summary
XXE vulnerability in Jenkins Visualworks Store Plugin
Details

Jenkins Visualworks Store Plugin 1.1.3 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

This allows attackers with the ability to control the output of a script that run Visualworks with StoreCI, or able to control an agent process, to have Jenkins parse a crafted file that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery.

Jenkins Visualworks Store Plugin 1.1.4 disables external entity resolution for its XML parser.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.plugins:visualworks-store"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-2315"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-12-22T13:44:43Z",
    "nvd_published_at": "2020-11-04T15:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Jenkins Visualworks Store Plugin 1.1.3 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.\n\nThis allows attackers with the ability to control the output of a script that run Visualworks with StoreCI, or able to control an agent process, to have Jenkins parse a crafted file that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery.\n\nJenkins Visualworks Store Plugin 1.1.4 disables external entity resolution for its XML parser.",
  "id": "GHSA-jvjm-j945-8qwc",
  "modified": "2023-10-27T13:11:14Z",
  "published": "2022-05-24T17:33:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-2315"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jenkinsci/visualworks-store-plugin/commit/267bb709c3412f6517b4631c867d16eb72af6d69"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jenkinsci/visualworks-store-plugin"
    },
    {
      "type": "WEB",
      "url": "https://www.jenkins.io/security/advisory/2020-11-04/#SECURITY-1900"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "XXE vulnerability in Jenkins Visualworks Store Plugin"
}

GHSA-JVMF-FPMJ-52R5

Vulnerability from github – Published: 2024-05-03 03:31 – Updated: 2024-05-03 03:31
VLAI
Details

Honeywell Saia PG5 Controls Suite XML External Entity Processing Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Honeywell Saia PG5 Controls Suite. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of XML files. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the current process. Was ZDI-CAN-18591.

Severity
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2023-51602"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-03T03:16:21Z",
    "severity": "MODERATE"
  },
  "details": "Honeywell Saia PG5 Controls Suite XML External Entity Processing Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Honeywell Saia PG5 Controls Suite. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of XML files. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the current process. Was ZDI-CAN-18591.",
  "id": "GHSA-jvmf-fpmj-52r5",
  "modified": "2024-05-03T03:31:08Z",
  "published": "2024-05-03T03:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-51602"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1851"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-JVQM-W56M-W3J7

Vulnerability from github – Published: 2025-01-18 00:30 – Updated: 2025-01-21 18:31
VLAI
Details

In multiple functions of MiniThumbFile.java, there is a possible way to view the thumbnails of deleted photos due to a confused deputy. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2018-9379"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-17T23:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In multiple functions of MiniThumbFile.java, there is a possible way to view the thumbnails of deleted photos due to a confused deputy. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.",
  "id": "GHSA-jvqm-w56m-w3j7",
  "modified": "2025-01-21T18:31:06Z",
  "published": "2025-01-18T00:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-9379"
    },
    {
      "type": "WEB",
      "url": "https://source.android.com/security/bulletin/pixel/2018-06-01"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-JVVX-4FHR-XXQV

Vulnerability from github – Published: 2022-05-24 17:36 – Updated: 2022-05-24 17:36
VLAI
Details

In Zimbra Collaboration Suite Network Edition versions < 9.0.0 P10 and 8.8.15 P17, there exists an XXE vulnerability in the saml consumer store extension, which is vulnerable to XXE attacks. This has been fixed in Zimbra Collaboration Suite Network edition 9.0.0 Patch 10 and 8.8.15 Patch 17.

Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2020-35123"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-12-17T04:15:00Z",
    "severity": "MODERATE"
  },
  "details": "In Zimbra Collaboration Suite Network Edition versions \u003c 9.0.0 P10 and 8.8.15 P17, there exists an XXE vulnerability in the saml consumer store extension, which is vulnerable to XXE attacks. This has been fixed in Zimbra Collaboration Suite Network edition 9.0.0 Patch 10 and 8.8.15 Patch 17.",
  "id": "GHSA-jvvx-4fhr-xxqv",
  "modified": "2022-05-24T17:36:45Z",
  "published": "2022-05-24T17:36:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35123"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Security_Center"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P17"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P10"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-JW37-C6Q4-X7H9

Vulnerability from github – Published: 2022-05-24 16:45 – Updated: 2024-04-04 00:38
VLAI
Details

ClientServiceConfigController.cs in Enghouse Cloud Contact Center Platform 7.2.5 has functionality for loading external XML files and parsing them, allowing an attacker to upload a malicious XML file and reference it in the URL of the application, forcing the application to load and parse the malicious XML file, aka an XXE issue.

Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2018-8940"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-05-14T19:29:00Z",
    "severity": "CRITICAL"
  },
  "details": "ClientServiceConfigController.cs in Enghouse Cloud Contact Center Platform 7.2.5 has functionality for loading external XML files and parsing them, allowing an attacker to upload a malicious XML file and reference it in the URL of the application, forcing the application to load and parse the malicious XML file, aka an XXE issue.",
  "id": "GHSA-jw37-c6q4-x7h9",
  "modified": "2024-04-04T00:38:07Z",
  "published": "2022-05-24T16:45:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-8940"
    },
    {
      "type": "WEB",
      "url": "https://seclists.org/fulldisclosure/2019/May/9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-JW4X-V69F-HH5W

Vulnerability from github – Published: 2024-11-18 20:01 – Updated: 2025-03-06 18:15
VLAI
Summary
XmlScanner bypass leads to XXE
Details

Summary

The XmlScanner class has a scan method which should prevent XXE attacks.

However, the regexes used in the scan method and the findCharSet method can be bypassed by using UCS-4 and encoding guessing as described in https://www.w3.org/TR/xml/#sec-guessing-no-ext-info.

Details

The scan method converts the input in the UTF-8 encoding if it is not already in the UTF-8 encoding with the toUtf8 method. Then, the scan method uses a regex which would also work with 16-bit encoding.

However, the regexes from the findCharSet method, which is used for determining the current encoding can be bypassed by using an encoding which has more than 8 bits, since the regex does not expect null bytes, and the XML library will also autodetect the encoding as described in https://www.w3.org/TR/xml/#sec-guessing-no-ext-info.

A payload for the workbook.xml file can for example be created with CyberChef&input=PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTE2IiBzdGFuZGFsb25lPSJ5ZXMiPz4KPCFET0NUWVBFIG1lc3NhZ2UgWwogICAgPCFFTlRJVFkgJSBleHQgU1lTVEVNICJodHRwOi8vMTI3LjAuMC4xOjEyMzQ1L2V4dC5kdGQiPgogICAgJWV4dDsKXT4KPHdvcmtib29rIHhtbG5zPSJodHRwOi8vc2NoZW1hcy5vcGVueG1sZm9ybWF0cy5vcmcvc3ByZWFkc2hlZXRtbC8yMDA2L21haW4iIHhtbG5zOnI9Imh0dHA6Ly9zY2hlbWFzLm9wZW54bWxmb3JtYXRzLm9yZy9vZmZpY2VEb2N1bWVudC8yMDA2L3JlbGF0aW9uc2hpcHMiPjxmaWxlVmVyc2lvbiBhcHBOYW1lPSJDYWxjIi8%2BPHdvcmtib29rUHIgYmFja3VwRmlsZT0iZmFsc2UiIHNob3dPYmplY3RzPSJhbGwiIGRhdGUxOTA0PSJmYWxzZSIvPjx3b3JrYm9va1Byb3RlY3Rpb24vPjxib29rVmlld3M%2BPHdvcmtib29rVmlldyBzaG93SG9yaXpvbnRhbFNjcm9sbD0idHJ1ZSIgc2hvd1ZlcnRpY2FsU2Nyb2xsPSJ0cnVlIiBzaG93U2hlZXRUYWJzPSJ0cnVlIiB4V2luZG93PSIwIiB5V2luZG93PSIwIiB3aW5kb3dXaWR0aD0iMTYzODQiIHdpbmRvd0hlaWdodD0iODE5MiIgdGFiUmF0aW89IjUwMCIgZmlyc3RTaGVldD0iMCIgYWN0aXZlVGFiPSIwIi8%2BPC9ib29rVmlld3M%2BPHNoZWV0cz48c2hlZXQgbmFtZT0iU2hlZXQxIiBzaGVldElkPSIxIiBzdGF0ZT0idmlzaWJsZSIgcjppZD0icklkMiIvPjwvc2hlZXRzPjxjYWxjUHIgaXRlcmF0ZUNvdW50PSIxMDAiIHJlZk1vZGU9IkExIiBpdGVyYXRlPSJmYWxzZSIgaXRlcmF0ZURlbHRhPSIwLjAwMSIvPjxleHRMc3Q%2BPGV4dCB4bWxuczpsb2V4dD0iaHR0cDovL3NjaGVtYXMubGlicmVvZmZpY2Uub3JnLyIgdXJpPSJ7NzYyNkM4NjItMkExMy0xMUU1LUIzNDUtRkVGRjgxOUNEQzlGfSI%2BPGxvZXh0OmV4dENhbGNQciBzdHJpbmdSZWZTeW50YXg9IkNhbGNBMSIvPjwvZXh0PjwvZXh0THN0Pjwvd29ya2Jvb2s%2B.). If you open an Excel file containing the payload from the link above stored in the workbook.xml file with PhpSpreadsheet, you will receive an HTTP request on 127.0.0.1:12345. You can test that an HTTP request is created by running the nc -nlvp 12345 command before opening the file containing the payload with PhpSpreadsheet.

PoC

  • Create a new folder.
  • Run the composer require phpoffice/phpspreadsheet command in the new folder.
  • Create an index.php file in that folder with the following content:
<?php
require 'vendor/autoload.php';

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

$spreadsheet = new Spreadsheet();

$inputFileType = 'Xlsx';
$inputFileName = './payload.xlsx';

/**  Create a new Reader of the type defined in $inputFileType  **/
$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader($inputFileType);
/**  Advise the Reader that we only want to load cell data  **/
$reader->setReadDataOnly(true);

$worksheetData = $reader->listWorksheetInfo($inputFileName);

foreach ($worksheetData as $worksheet) {

$sheetName = $worksheet['worksheetName'];

echo "<h4>$sheetName</h4>";
/**  Load $inputFileName to a Spreadsheet Object  **/
$reader->setLoadSheetsOnly($sheetName);
$spreadsheet = $reader->load($inputFileName);

$worksheet = $spreadsheet->getActiveSheet();
print_r($worksheet->toArray());

}

Impact

An attacker can bypass the sanitizer and achieve an XXE attack.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpoffice/phpspreadsheet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.29.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpoffice/phpspreadsheet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpoffice/phpspreadsheet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.2.0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpoffice/phpspreadsheet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.3.0"
            },
            {
              "fixed": "3.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpoffice/phpexcel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.8.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-47873"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-11-18T20:01:20Z",
    "nvd_published_at": "2024-11-18T17:15:11Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nThe [XmlScanner class](https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php) has a [scan](https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php#L72) method which should prevent XXE attacks.\n\nHowever, the regexes used in the `scan` method and the [findCharSet](https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php#L51) method can be bypassed by using UCS-4 and encoding guessing as described in \u003chttps://www.w3.org/TR/xml/#sec-guessing-no-ext-info\u003e.\n\n\n### Details\nThe `scan` method converts the input in the UTF-8 encoding if it is not already in the UTF-8 encoding with the [`toUtf8` method](https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php#L76).\nThen, the `scan` method uses a [regex](https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php#L79) which would also work with 16-bit encoding.\n\nHowever, the regexes from the [findCharSet](https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php#L51) method, which is used for determining the current encoding can be bypassed by using an encoding which has more than 8 bits, since the regex does not expect null bytes, and the XML library will also autodetect the encoding as described in \u003chttps://www.w3.org/TR/xml/#sec-guessing-no-ext-info\u003e.\n\nA payload for the `workbook.xml` file can for example be created with [CyberChef](https://gchq.github.io/CyberChef/#recipe=Encode_text(\u0027UTF-32BE%20(12001)\u0027)\u0026input=PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTE2IiBzdGFuZGFsb25lPSJ5ZXMiPz4KPCFET0NUWVBFIG1lc3NhZ2UgWwogICAgPCFFTlRJVFkgJSBleHQgU1lTVEVNICJodHRwOi8vMTI3LjAuMC4xOjEyMzQ1L2V4dC5kdGQiPgogICAgJWV4dDsKXT4KPHdvcmtib29rIHhtbG5zPSJodHRwOi8vc2NoZW1hcy5vcGVueG1sZm9ybWF0cy5vcmcvc3ByZWFkc2hlZXRtbC8yMDA2L21haW4iIHhtbG5zOnI9Imh0dHA6Ly9zY2hlbWFzLm9wZW54bWxmb3JtYXRzLm9yZy9vZmZpY2VEb2N1bWVudC8yMDA2L3JlbGF0aW9uc2hpcHMiPjxmaWxlVmVyc2lvbiBhcHBOYW1lPSJDYWxjIi8%2BPHdvcmtib29rUHIgYmFja3VwRmlsZT0iZmFsc2UiIHNob3dPYmplY3RzPSJhbGwiIGRhdGUxOTA0PSJmYWxzZSIvPjx3b3JrYm9va1Byb3RlY3Rpb24vPjxib29rVmlld3M%2BPHdvcmtib29rVmlldyBzaG93SG9yaXpvbnRhbFNjcm9sbD0idHJ1ZSIgc2hvd1ZlcnRpY2FsU2Nyb2xsPSJ0cnVlIiBzaG93U2hlZXRUYWJzPSJ0cnVlIiB4V2luZG93PSIwIiB5V2luZG93PSIwIiB3aW5kb3dXaWR0aD0iMTYzODQiIHdpbmRvd0hlaWdodD0iODE5MiIgdGFiUmF0aW89IjUwMCIgZmlyc3RTaGVldD0iMCIgYWN0aXZlVGFiPSIwIi8%2BPC9ib29rVmlld3M%2BPHNoZWV0cz48c2hlZXQgbmFtZT0iU2hlZXQxIiBzaGVldElkPSIxIiBzdGF0ZT0idmlzaWJsZSIgcjppZD0icklkMiIvPjwvc2hlZXRzPjxjYWxjUHIgaXRlcmF0ZUNvdW50PSIxMDAiIHJlZk1vZGU9IkExIiBpdGVyYXRlPSJmYWxzZSIgaXRlcmF0ZURlbHRhPSIwLjAwMSIvPjxleHRMc3Q%2BPGV4dCB4bWxuczpsb2V4dD0iaHR0cDovL3NjaGVtYXMubGlicmVvZmZpY2Uub3JnLyIgdXJpPSJ7NzYyNkM4NjItMkExMy0xMUU1LUIzNDUtRkVGRjgxOUNEQzlGfSI%2BPGxvZXh0OmV4dENhbGNQciBzdHJpbmdSZWZTeW50YXg9IkNhbGNBMSIvPjwvZXh0PjwvZXh0THN0Pjwvd29ya2Jvb2s%2B.).\nIf you open an Excel file containing the payload from the link above stored in the `workbook.xml` file with PhpSpreadsheet, you will receive an HTTP request on `127.0.0.1:12345`. You can test that an HTTP request is created by running the `nc -nlvp 12345` command before opening the file containing the payload with PhpSpreadsheet.\n\n### PoC\n\n- Create a new folder.\n- Run the `composer require phpoffice/phpspreadsheet` command in the new folder.\n- Create an `index.php` file in that folder with the following content:\n```PHP\n\u003c?php\nrequire \u0027vendor/autoload.php\u0027;\n\nuse PhpOffice\\PhpSpreadsheet\\Spreadsheet;\nuse PhpOffice\\PhpSpreadsheet\\Writer\\Xlsx;\n\n$spreadsheet = new Spreadsheet();\n\n$inputFileType = \u0027Xlsx\u0027;\n$inputFileName = \u0027./payload.xlsx\u0027;\n\n/**  Create a new Reader of the type defined in $inputFileType  **/\n$reader = \\PhpOffice\\PhpSpreadsheet\\IOFactory::createReader($inputFileType);\n/**  Advise the Reader that we only want to load cell data  **/\n$reader-\u003esetReadDataOnly(true);\n\n$worksheetData = $reader-\u003elistWorksheetInfo($inputFileName);\n\nforeach ($worksheetData as $worksheet) {\n\n$sheetName = $worksheet[\u0027worksheetName\u0027];\n\necho \"\u003ch4\u003e$sheetName\u003c/h4\u003e\";\n/**  Load $inputFileName to a Spreadsheet Object  **/\n$reader-\u003esetLoadSheetsOnly($sheetName);\n$spreadsheet = $reader-\u003eload($inputFileName);\n\n$worksheet = $spreadsheet-\u003egetActiveSheet();\nprint_r($worksheet-\u003etoArray());\n\n}\n```\n- Run the following command: `php -S 127.0.0.1:8080`\n- Add the [payload.xlsx](https://github.com/user-attachments/files/17334157/payload.xlsx) file, which contains a payload similar to the payload from the details section, but with the URL `https://webhook.site/65744200-63d2-43a2-a6a0-cca8d6b0d50a` instead of the `http://127.0.0.1:12345/ext.dtd` URL, in the folder and open \u003chttps://127.0.0.1:8080\u003e in a browser. You will see an HTTP request on \u003chttps://webhook.site/#!/view/65744200-63d2-43a2-a6a0-cca8d6b0d50a\u003e.\n\n### Impact\nAn attacker can bypass the sanitizer and achieve an [XXE attack](https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing).",
  "id": "GHSA-jw4x-v69f-hh5w",
  "modified": "2025-03-06T18:15:31Z",
  "published": "2024-11-18T20:01:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-jw4x-v69f-hh5w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47873"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php"
    },
    {
      "type": "WEB",
      "url": "https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing"
    },
    {
      "type": "WEB",
      "url": "https://www.w3.org/TR/xml/#sec-guessing-no-ext-info"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "XmlScanner bypass leads to XXE"
}

GHSA-JWWR-FJGH-CV2X

Vulnerability from github – Published: 2022-05-13 01:05 – Updated: 2026-04-16 18:07
VLAI
Summary
Improper Restriction of XML External Entity Reference in Castor
Details

The default configuration for the Xerces SAX Parser in Castor before 1.3.3 allows context-dependent attackers to conduct XML External Entity (XXE) attacks via a crafted XML document.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.codehaus.castor:castor"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "castor:castor"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2014-3004"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-07-07T22:43:25Z",
    "nvd_published_at": "2014-06-11T14:55:00Z",
    "severity": "MODERATE"
  },
  "details": "The default configuration for the Xerces SAX Parser in Castor before 1.3.3 allows context-dependent attackers to conduct XML External Entity (XXE) attacks via a crafted XML document.",
  "id": "GHSA-jwwr-fjgh-cv2x",
  "modified": "2026-04-16T18:07:55Z",
  "published": "2022-05-13T01:05:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-3004"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/castor-data-binding/castor"
    },
    {
      "type": "WEB",
      "url": "https://quickview.cloudapps.cisco.com/quickview/bug/CSCvm56811"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpujan2020.html"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-updates/2014-06/msg00043.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/126854/Castor-Library-XXE-Disclosure.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2014/May/142"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Improper Restriction of XML External Entity Reference in Castor"
}

GHSA-JX49-FPHC-W293

Vulnerability from github – Published: 2026-03-19 12:30 – Updated: 2026-03-19 12:30
VLAI
Details

Improper Restriction of XML External Entity Reference vulnerability in XMLUtils.java in Slovensko.Digital Autogram allows remote unauthenticated attacker to conduct SSRF (Server Side Request Forgery) attacks and obtain unauthorized access to local files on filesystems running the vulnerable application. Successful exploitation requires the victim to visit a specially crafted website that sends request containing a specially crafted XML document to /sign endpoint of the local HTTP server run by the application.

Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-3511"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-19T12:16:18Z",
    "severity": "HIGH"
  },
  "details": "Improper Restriction of XML External Entity Reference vulnerability in XMLUtils.java in Slovensko.Digital Autogram allows remote unauthenticated attacker to conduct SSRF (Server Side Request Forgery) attacks and obtain unauthorized access to local files on filesystems running the vulnerable application. Successful exploitation requires the victim to visit a specially crafted website that sends request containing a specially crafted XML document to /sign endpoint of the local HTTP server run by the application.",
  "id": "GHSA-jx49-fphc-w293",
  "modified": "2026-03-19T12:30:33Z",
  "published": "2026-03-19T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3511"
    },
    {
      "type": "WEB",
      "url": "https://blog.binary.house/2026/03/pripadova-studia-ako-sme-s-claude-code.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/slovensko-digital/autogram/releases/tag/v2.7.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-JXG2-8MCP-74Q3

Vulnerability from github – Published: 2024-02-29 03:33 – Updated: 2024-02-29 03:33
VLAI
Details

IBM Security Guardium Key Lifecycle Manager 3.0, 3.0.1, 4.0, 4.1, and 4.1.1 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 247599.

Severity
5.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2023-25926"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-29T01:38:24Z",
    "severity": "MODERATE"
  },
  "details": "IBM Security Guardium Key Lifecycle Manager 3.0, 3.0.1, 4.0, 4.1, and 4.1.1 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources.  IBM X-Force ID:  247599.",
  "id": "GHSA-jxg2-8mcp-74q3",
  "modified": "2024-02-29T03:33:12Z",
  "published": "2024-02-29T03:33:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-25926"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/247599"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/node/6964516"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-JXG7-VV7X-X8FJ

Vulnerability from github – Published: 2022-05-13 01:33 – Updated: 2022-05-13 01:33
VLAI
Details

IBM WebSphere DataPower Appliances 7.1, 7.2, 7.5, 7.5.1, 7.5.2, and 7.6 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 139023.

Severity
7.1 (High)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2018-1421"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-04-04T18:29:00Z",
    "severity": "HIGH"
  },
  "details": "IBM WebSphere DataPower Appliances 7.1, 7.2, 7.5, 7.5.1, 7.5.2, and 7.6 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 139023.",
  "id": "GHSA-jxg7-vv7x-x8fj",
  "modified": "2022-05-13T01:33:18Z",
  "published": "2022-05-13T01:33:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1421"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/139023"
    },
    {
      "type": "WEB",
      "url": "http://www.ibm.com/support/docview.wss?uid=swg22015055"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}
Mitigation
Implementation System Configuration

Many XML parsers and validators can be configured to disable external entity expansion.

CAPEC-221: Data Serialization External Entities Blowup

This attack takes advantage of the entity replacement property of certain data serialization languages (e.g., XML, YAML, etc.) where the value of the replacement is a URI. A well-crafted file could have the entity refer to a URI that consumes a large amount of resources to create a denial of service condition. This can cause the system to either freeze, crash, or execute arbitrary code depending on the URI.

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