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Common Weakness Enumeration

CWE-434

Allowed

Unrestricted Upload of File with Dangerous Type

Abstraction: Base · Status: Draft

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

6250 vulnerabilities reference this CWE, most recent first.

CVE-2026-19383 (GCVE-0-2026-19383)

Vulnerability from cvelistv5 – Published: 2026-08-10 01:00 – Updated: 2026-08-10 16:16
VLAI
Title
saithink/saigroup SaiAdmin Plugin Upload Endpoint upload shell_exec unrestricted upload
Summary
A security vulnerability has been detected in saithink/saigroup SaiAdmin up to 5.0.1. This impacts the function shell_exec of the file /app/saipackage/install/upload of the component Plugin Upload Endpoint. The manipulation leads to unrestricted upload. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. This product is published by multiple vendors.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 16:15 UTC
CWE
References
URL Tags
https://vuldb.com/vuln/387276 vdb-entrytechnical-description
https://vuldb.com/vuln/387276/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19383 third-party-advisory
https://vuldb.com/submit/866981 third-party-advisory
https://github.com/sign9981/CVE/issues/1 exploitissue-tracking
Impacted products
Vendor Product Version
saithink SaiAdmin Affected: 5.0.0
Affected: 5.0.1
    cpe:2.3:a:saithink:saiadmin:*:*:*:*:*:*:*:*
Create a notification for this product.
saigroup SaiAdmin Affected: 5.0.0
Affected: 5.0.1
    cpe:2.3:a:saigroup:saiadmin:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-19219 (GCVE-0-2026-19219)

Vulnerability from cvelistv5 – Published: 2026-09-02 10:35 – Updated: 2026-09-03 03:56
VLAI
Title
DialogHandler UploadPaths Tampering Vulnerability in Telerik UI for ASP.NET AJAX
Summary
In Progress® Telerik® UI for AJAX prior to v2026.3.812, insufficient integrity protection of dialog request parameters used by the RadEditor file browser may allow an attacker who has obtained certain application encryption key material to alter the folders the file browser reads from, writes to, and uploads into, potentially resulting in remote code execution.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 00:00 UTC
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
References
Impacted products
Vendor Product Version
Progress Software Telerik UI for ASP.NET AJAX Affected: 2011.2.712 , < 2026.3.812 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-19210 (GCVE-0-2026-19210)

Vulnerability from cvelistv5 – Published: 2026-08-07 16:00 – Updated: 2026-08-07 18:02 X_Freeware
VLAI
Title
SourceCodester Photo Share Website ajax.php save_upload unrestricted upload
Summary
A vulnerability has been found in SourceCodester Photo Share Website 1.0. The impacted element is an unknown function of the file /social/ajax.php?action=save_upload. Such manipulation of the argument img[]/imgName[] leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 18:02 UTC
CWE
References
URL Tags
https://vuldb.com/vuln/386955 vdb-entrytechnical-description
https://vuldb.com/vuln/386955/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19210 third-party-advisory
https://vuldb.com/submit/864867 third-party-advisory
https://github.com/gensnext/cve/issues/2 exploitissue-tracking
https://www.sourcecodester.com/ product
Impacted products
Vendor Product Version
SourceCodester Photo Share Website Affected: 1.0
    cpe:2.3:a:sourcecodester:photo_share_website:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-19065 (GCVE-0-2026-19065)

Vulnerability from cvelistv5 – Published: 2026-08-06 18:15 – Updated: 2026-08-07 18:00 X_Freeware
VLAI
Title
SourceCodester Online Examination & Learning Management System upload_files.php unrestricted upload
Summary
A vulnerability was determined in SourceCodester Online Examination & Learning Management System 1.0. This issue affects some unknown processing of the file upload_files.php. This manipulation causes unrestricted upload. The attack may be initiated remotely.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 18:00 UTC
CWE
References
Impacted products
Vendor Product Version
SourceCodester Online Examination & Learning Management System Affected: 1.0
    cpe:2.3:a:sourcecodester:online_examination_learning_management_system:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-18983 (GCVE-0-2026-18983)

Vulnerability from cvelistv5 – Published: 2026-08-28 03:39 – Updated: 2026-08-28 17:11
VLAI
Title
One User Avatar | User Profile Picture <= 2.5.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via wpua-file Parameter
Summary
The One User Avatar | User Profile Picture plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.5.4 via the wpua_action_process_option_update function. This is due to insufficient file type validation in wp_handle_upload() called without a MIME allow-list, with post-write validation relying on the attacker-controlled client-supplied Content-Type header rather than a server-derived type, and no cleanup of files that fail the check. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. in order to exploit this vulnerability an admin has to give subscribers permission to upload avatars. While PHP files and svg files are rejected, dxfp files are accepted.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:55 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Impacted products
Credits
Show details on NVD website

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CVE-2026-18969 (GCVE-0-2026-18969)

Vulnerability from cvelistv5 – Published: 2026-08-05 23:30 – Updated: 2026-08-06 15:08
VLAI
Title
Rongzhitong Visual Integrated Command and Dispatch Platform upload unrestricted upload
Summary
A vulnerability was detected in Rongzhitong Visual Integrated Command and Dispatch Platform up to 20260617. Impacted is an unknown function of the file /dm/dispatch/userinfo/upload. Performing a manipulation of the argument File results in unrestricted upload. It is possible to initiate the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 15:07 UTC
CWE
References
URL Tags
https://vuldb.com/vuln/386260 vdb-entrytechnical-description
https://vuldb.com/vuln/386260/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18969 third-party-advisory
https://vuldb.com/submit/860572 third-party-advisory
https://ucn9h68n9289.feishu.cn/wiki/CVIpwknSYiQXe… exploit
Impacted products
Vendor Product Version
Rongzhitong Visual Integrated Command and Dispatch Platform Affected: 20260617
    cpe:2.3:a:rongzhitong:visual_integrated_command_and_dispatch_platform:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-18933 (GCVE-0-2026-18933)

Vulnerability from cvelistv5 – Published: 2026-08-05 11:27 – Updated: 2026-08-10 11:43
VLAI
Title
wp-downloadmanager - Unrestricted File Upload via Missing Extension/MIME Validation and Path Traversal
Summary
The wp-downloadmanager WordPress plugin, in version 1.68.11 (also affecting the 6.9.4 release line), allows an admin-privileged user (current_user_can('manage_downloads')) to upload arbitrary files via download-add.php with no extension or MIME-type validation of any kind - no wp_check_filetype_and_ext, no validate_file, and no extension blocklist exist anywhere in the upload handler.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 12:30 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
References
Impacted products
Vendor Product Version
wp-downloadmanager wp-downloadmanager Affected: 0 , ≤ 1.69 (custom)
Create a notification for this product.
Date Public
2026-08-05 11:27
Credits
Show details on NVD website

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CVE-2026-18927 (GCVE-0-2026-18927)

Vulnerability from cvelistv5 – Published: 2026-08-05 16:30 – Updated: 2026-08-05 17:10
VLAI
Title
imranrisal-dev Student-Management-System Shared Upload Helper student_profile_pic.php storeProfileImage unrestricted upload
Summary
A vulnerability was determined in imranrisal-dev Student-Management-System 18ea7904c339e0c7b0234724a79c939ce6191def/a8d43a29aaf267e7ca97171d6dbb44057bcd7f8c. This affects the function storeProfileImage of the file student_profile_pic.php of the component Shared Upload Helper. Executing a manipulation of the argument choose_file can lead to unrestricted upload. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 17:09 UTC
CWE
References
URL Tags
https://vuldb.com/vuln/386147 vdb-entrytechnical-description
https://vuldb.com/vuln/386147/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18927 third-party-advisory
https://vuldb.com/submit/860103 third-party-advisory
https://github.com/sanjibsajid381-ctrl/My-Web-cve… exploitissue-tracking
Impacted products
Vendor Product Version
imranrisal-dev Student-Management-System Affected: 18ea7904c339e0c7b0234724a79c939ce6191def
Affected: a8d43a29aaf267e7ca97171d6dbb44057bcd7f8c
    cpe:2.3:a:imranrisal-dev:student-management-system:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-18788 (GCVE-0-2026-18788)

Vulnerability from cvelistv5 – Published: 2026-08-04 17:15 – Updated: 2026-08-05 13:45 Unsupported When Assigned
VLAI
Title
Trippo ResponsiveFilemanager dialog.php unrestricted upload
Summary
A security flaw has been discovered in Trippo ResponsiveFilemanager up to 9.14.0. The impacted element is an unknown function of the file filemanager/dialog.php. The manipulation results in unrestricted upload. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 13:44 UTC
CWE
References
Impacted products
Vendor Product Version
Trippo ResponsiveFilemanager Affected: 9.0
Affected: 9.1
Affected: 9.2
Affected: 9.3
Affected: 9.4
Affected: 9.5
Affected: 9.6
Affected: 9.7
Affected: 9.8
Affected: 9.9
Affected: 9.10
Affected: 9.11
Affected: 9.12
Affected: 9.13
Affected: 9.14.0
    cpe:2.3:a:trippo:responsivefilemanager:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-18438 (GCVE-0-2026-18438)

Vulnerability from cvelistv5 – Published: 2026-08-15 09:25 – Updated: 2026-08-17 19:38
VLAI
Title
Templately <= 3.7.1 - Authenticated (Contributor+) Arbitrary File Upload to Remote Code Execution via Gutenberg Cloud Import Attachment Filename Mismatch
Summary
The Templately – Elementor & Gutenberg Template Library: 6500+ Free & Pro Ready Templates And Cloud! plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 3.7.1 via the fetch_remote_file function. This is due to a filename validation/destination mismatch in fetch_remote_file, where file type validation is performed against the attacker-controlled Content-Disposition filename rather than the URL-path-derived destination filename. This makes it possible for authenticated attackers, with contributor-level access and above, to execute code on the server. A GIF+PHP polyglot file passes wp_check_filetype_and_ext validation as image/gif via the Content-Disposition filename, while the actual destination path is written with a .php extension derived from the URL path, bypassing the unfiltered_upload capability gate entirely. The affected endpoints are reachable at this privilege level because Templately's entire REST API — including the cloud import endpoints used in this attack (/templately/v1/clouds/upload and /templately/v1/insert) — is authorized only by a current_user_can('delete_posts') check, with no administrator or manage_options capability requirement. The same permission gate also allows a contributor to overwrite the site's global Templately cloud connection via the /templately/v1/login endpoint with global_signin set to true. A complete remediation should both correct fetch_remote_file to validate the file type against the actual destination filename rather than the Content-Disposition header (and avoid deriving the write path from the request URL), and restrict state-changing Templately REST routes to an appropriate administrator-level capability.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 19:26 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Show details on NVD website

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          "value": "The Templately \u2013 Elementor \u0026 Gutenberg Template Library: 6500+ Free \u0026 Pro Ready Templates And Cloud! plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 3.7.1 via the fetch_remote_file function. This is due to a filename validation/destination mismatch in fetch_remote_file, where file type validation is performed against the attacker-controlled Content-Disposition filename rather than the URL-path-derived destination filename. This makes it possible for authenticated attackers, with contributor-level access and above, to execute code on the server. A GIF+PHP polyglot file passes wp_check_filetype_and_ext validation as image/gif via the Content-Disposition filename, while the actual destination path is written with a .php extension derived from the URL path, bypassing the unfiltered_upload capability gate entirely. The affected endpoints are reachable at this privilege level because Templately\u0027s entire REST API \u2014 including the cloud import endpoints used in this attack (/templately/v1/clouds/upload and /templately/v1/insert) \u2014 is authorized only by a current_user_can(\u0027delete_posts\u0027) check, with no administrator or manage_options capability requirement. The same permission gate also allows a contributor to overwrite the site\u0027s global Templately cloud connection via the /templately/v1/login endpoint with global_signin set to true. A complete remediation should both correct fetch_remote_file to validate the file type against the actual destination filename rather than the Content-Disposition header (and avoid deriving the write path from the request URL), and restrict state-changing Templately REST routes to an appropriate administrator-level capability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-434",
              "description": "CWE-434 Unrestricted Upload of File with Dangerous Type",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-15T09:25:18.170Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/4e68b2f2-12e4-4ff2-919d-26d6b21acd03?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Importer/WPImport.php#L1423"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Importer/WPImport.php#L1200"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Importer/WPImport.php#L1391"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Platform/Gutenberg.php#L177"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/API/Import.php#L78"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/API/MyClouds.php#L103"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/API/API.php#L128"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Importer/WPImport.php#L1423"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Importer/WPImport.php#L1200"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Importer/WPImport.php#L1391"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Platform/Gutenberg.php#L177"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/API/Import.php#L78"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/API/MyClouds.php#L103"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/API/API.php#L128"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3636643%40templately%2Ftags%2F3.7.2\u0026old=3624408%40templately%2Ftags%2F3.7.1"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3636643/templately/trunk/includes/Core/Importer/WPImport.php"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Ftemplately/tags/3.7.1\u0026new_path=%2Ftemplately/tags/3.7.2"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-30T20:38:18.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-08-14T20:45:28.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Templately \u003c= 3.7.1 - Authenticated (Contributor+) Arbitrary File Upload to Remote Code Execution via Gutenberg Cloud Import Attachment Filename Mismatch"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-18438",
    "datePublished": "2026-08-15T09:25:18.170Z",
    "dateReserved": "2026-07-30T20:22:04.692Z",
    "dateUpdated": "2026-08-17T19:38:56.823Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Mitigation
Architecture and Design

Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.[REF-422] [REF-423]

Mitigation MIT-21
Architecture and Design

Strategy: Enforcement by Conversion

When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.

Mitigation
Architecture and Design

Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically. [REF-423]

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • For example, limiting filenames to alphanumeric characters can help to restrict the introduction of unintended file extensions.
Mitigation
Architecture and Design

Define a very limited set of allowable extensions and only generate filenames that end in these extensions. Consider the possibility of XSS (CWE-79) before allowing .html or .htm file types.

Mitigation
Implementation

Strategy: Input Validation

Ensure that only one extension is used in the filename. Some web servers, including some versions of Apache, may process files based on inner extensions so that "filename.php.gif" is fed to the PHP interpreter.[REF-422] [REF-423]

Mitigation
Implementation

When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.

Mitigation MIT-15
Architecture and Design

For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

Mitigation
Implementation

Do not rely exclusively on sanity checks of file contents to ensure that the file is of the expected type and size. It may be possible for an attacker to hide code in some file segments that will still be executed by the server. For example, GIF images may contain a free-form comments field.

Mitigation
Implementation

Do not rely exclusively on the MIME content type or filename attribute when determining how to render a file. Validating the MIME content type and ensuring that it matches the extension is only a partial solution.

Mitigation MIT-17
Architecture and Design Operation

Strategy: Environment Hardening

Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.

Mitigation MIT-22
Architecture and Design Operation

Strategy: Sandbox or Jail

  • Run the code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.
CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs

In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.