CWE-611
AllowedImproper Restriction of XML External Entity Reference
Abstraction: Base · Status: Draft
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-86M6-G2F9-MWM6
Vulnerability from github – Published: 2022-05-24 17:43 – Updated: 2022-05-24 17:43A remote authenticated authenticated xml external entity (xxe) vulnerability was discovered in Aruba AirWave Management Platform version(s): Prior to 8.2.12.0. Due to improper restrictions on XML entities a vulnerability exists in the web-based management interface of AirWave. A successful exploit could allow an authenticated attacker to retrieve files from the local system or cause the application to consume system resources, resulting in a denial of service condition.
{
"affected": [],
"aliases": [
"CVE-2021-26969"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-05T17:15:00Z",
"severity": "MODERATE"
},
"details": "A remote authenticated authenticated xml external entity (xxe) vulnerability was discovered in Aruba AirWave Management Platform version(s): Prior to 8.2.12.0. Due to improper restrictions on XML entities a vulnerability exists in the web-based management interface of AirWave. A successful exploit could allow an authenticated attacker to retrieve files from the local system or cause the application to consume system resources, resulting in a denial of service condition.",
"id": "GHSA-86m6-g2f9-mwm6",
"modified": "2022-05-24T17:43:46Z",
"published": "2022-05-24T17:43:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26969"
},
{
"type": "WEB",
"url": "https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-005.txt"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-86P9-X5PW-94QX
Vulnerability from github – Published: 2022-05-13 01:14 – Updated: 2024-03-06 21:45The XML parsers in iText before 5.5.12 and 7.x before 7.0.3 do not disable external entities, which might allow remote attackers to conduct XML external entity (XXE) attacks via a crafted PDF.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.itextpdf:itextpdf"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.5.12"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.itextpdf:itextpdf"
},
"ranges": [
{
"events": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.0.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.lowagie:itext"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "4.2.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2017-9096"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": true,
"github_reviewed_at": "2022-06-30T19:51:56Z",
"nvd_published_at": "2017-11-08T16:29:00Z",
"severity": "HIGH"
},
"details": "The XML parsers in iText before 5.5.12 and 7.x before 7.0.3 do not disable external entities, which might allow remote attackers to conduct XML external entity (XXE) attacks via a crafted PDF.",
"id": "GHSA-86p9-x5pw-94qx",
"modified": "2024-03-06T21:45:40Z",
"published": "2022-05-13T01:14:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-9096"
},
{
"type": "WEB",
"url": "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbhf03902en_us"
},
{
"type": "WEB",
"url": "https://www.compass-security.com/fileadmin/Datein/Research/Advisories/CSNC-2017-017_itext_xml_external_entity_attack.txt"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/541483/100/0/threaded"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Improper Restriction of XML External Entity Reference in iText"
}
GHSA-882R-R8FW-P538
Vulnerability from github – Published: 2022-05-13 01:31 – Updated: 2022-05-26 18:54An XML external entity (XXE) processing vulnerability exists in Jenkins Job Import Plugin 2.1 and earlier in src/main/java/org/jenkins/ci/plugins/jobimport/client/RestApiClient.java that allows attackers with the ability to control the HTTP server (Jenkins) queried in preparation of job import to read arbitrary files, perform a denial of service attack, etc.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.jenkins-ci.plugins:job-import-plugin"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-1003015"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": true,
"github_reviewed_at": "2022-05-26T18:54:26Z",
"nvd_published_at": "2019-02-06T16:29:00Z",
"severity": "CRITICAL"
},
"details": "An XML external entity (XXE) processing vulnerability exists in Jenkins Job Import Plugin 2.1 and earlier in src/main/java/org/jenkins/ci/plugins/jobimport/client/RestApiClient.java that allows attackers with the ability to control the HTTP server (Jenkins) queried in preparation of job import to read arbitrary files, perform a denial of service attack, etc.",
"id": "GHSA-882r-r8fw-p538",
"modified": "2022-05-26T18:54:26Z",
"published": "2022-05-13T01:31:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1003015"
},
{
"type": "PACKAGE",
"url": "https://github.com/jenkinsci/job-import-plugin"
},
{
"type": "WEB",
"url": "https://jenkins.io/security/advisory/2019-01-28/#SECURITY-905%20(1)"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "XXE vulnerability in Jenkins Job Import Plugin"
}
GHSA-8847-XVJW-9G43
Vulnerability from github – Published: 2022-11-16 12:00 – Updated: 2025-04-30 20:36OSF Builder Suite : : XML Linter 1.0.2 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
This allows attackers able to control XML files that get processed by the 'OSF Builder Suite : : XML Linter' build step to have agent processes parse a crafted file that uses external entities for extraction of secrets from the Jenkins agent or server-side request forgery.
Because Jenkins agent processes usually execute build tools whose input (source code, build scripts, etc.) is controlled externally, this vulnerability only has a real impact in very narrow circumstances: when attackers can control XML files, but are unable to change build steps, Jenkinsfiles, test code that gets executed on the agents, or similar.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.jenkins-ci:update-center2"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.0.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-45397"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": true,
"github_reviewed_at": "2022-11-21T22:25:46Z",
"nvd_published_at": "2022-11-15T20:15:00Z",
"severity": "MODERATE"
},
"details": "OSF Builder Suite : : XML Linter 1.0.2 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.\n\nThis allows attackers able to control XML files that get processed by the \u0027OSF Builder Suite : : XML Linter\u0027 build step to have agent processes parse a crafted file that uses external entities for extraction of secrets from the Jenkins agent or server-side request forgery.\n\nBecause Jenkins agent processes usually execute build tools whose input (source code, build scripts, etc.) is controlled externally, this vulnerability only has a real impact in very narrow circumstances: when attackers can control XML files, but are unable to change build steps, Jenkinsfiles, test code that gets executed on the agents, or similar.",
"id": "GHSA-8847-xvjw-9g43",
"modified": "2025-04-30T20:36:43Z",
"published": "2022-11-16T12:00:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-45397"
},
{
"type": "WEB",
"url": "https://github.com/jenkins-infra/update-center2/pull/658"
},
{
"type": "WEB",
"url": "https://github.com/jenkinsci/osf-builder-suite-xml-linter-plugin"
},
{
"type": "WEB",
"url": "https://www.jenkins.io/security/advisory/2022-11-15/#SECURITY-2937"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2022/11/15/4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "XXE vulnerability on agents in Jenkins OSF Builder Suite : : XML Linter Plugin"
}
GHSA-88CC-G835-76RP
Vulnerability from github – Published: 2022-02-10 00:30 – Updated: 2024-05-15 06:44PostgreSQL JDBC Driver (aka PgJDBC) before 42.2.13 allows XXE.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.postgresql:postgresql"
},
"ranges": [
{
"events": [
{
"introduced": "9.4.1212.jre6"
},
{
"fixed": "42.2.13"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-13692"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-14T21:31:45Z",
"nvd_published_at": "2020-06-04T16:15:00Z",
"severity": "HIGH"
},
"details": "PostgreSQL JDBC Driver (aka PgJDBC) before 42.2.13 allows XXE.",
"id": "GHSA-88cc-g835-76rp",
"modified": "2024-05-15T06:44:16Z",
"published": "2022-02-10T00:30:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-13692"
},
{
"type": "WEB",
"url": "https://github.com/pgjdbc/pgjdbc/commit/14b62aca4764d496813f55a43d050b017e01eb65"
},
{
"type": "WEB",
"url": "https://jdbc.postgresql.org/documentation/changelog.html#version_42.2.13"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r00bcc6b2da972e0d6332a4ebc7807e17305d8b8e7fb2ae63d2a3cbfb@%3Ccommits.camel.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r01ae1b3d981cf2e563e9b5b0a6ea54fb3cac8e9a0512ee5269e3420e@%3Ccommits.camel.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r0478a1aa9ae0dbd79d8f7b38d0d93fa933ac232e2b430b6f31a103c0@%3Ccommits.camel.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r1aae77706aab7d89b4fe19be468fc3c73e9cc84ff79cc2c3bd07c05a@%3Ccommits.camel.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r4bdea189c9991aae7a929d28f575ec46e49ed3d68fa5235825f38a4f@%3Cnotifications.netbeans.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r631f967db6260d6178740a3314a35d9421facd8212e62320275fa78e@%3Ccommits.camel.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r7f6d019839df17646ffd0046a99146cacf40492a6c92078f65fd32e0@%3Ccommits.camel.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rb89f92aba44f524d5c270e0c44ca7aec4704691c37fe106cf73ec977@%3Cnotifications.netbeans.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rfe363bf3a46d440ad57fd05c0e313025c7218364bbdc5fd8622ea7ae@%3Ccommits.camel.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DCCAPM6FSNOC272DLSNQ6YHXS3OMHGJC"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20200619-0005"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5196"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H",
"type": "CVSS_V3"
}
],
"summary": "Improper Restriction of XML External Entity Reference"
}
GHSA-88HG-2F8P-PV3W
Vulnerability from github – Published: 2022-04-22 00:24 – Updated: 2023-02-13 06:31The /webtools/control/xmlrpc endpoint in OFBiz XML-RPC event handler is exposed to External Entity Injection by passing DOCTYPE declarations with executable payloads that discloses the contents of files in the filesystem. In addition, it can also be used to probe for open network ports, and figure out from returned error messages whether a file exists or not. This affects OFBiz 16.11.01 to 16.11.04.
{
"affected": [],
"aliases": [
"CVE-2011-3600"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-11-26T01:15:00Z",
"severity": "HIGH"
},
"details": "The /webtools/control/xmlrpc endpoint in OFBiz XML-RPC event handler is exposed to External Entity Injection by passing DOCTYPE declarations with executable payloads that discloses the contents of files in the filesystem. In addition, it can also be used to probe for open network ports, and figure out from returned error messages whether a file exists or not. This affects OFBiz 16.11.01 to 16.11.04.",
"id": "GHSA-88hg-2f8p-pv3w",
"modified": "2023-02-13T06:31:34Z",
"published": "2022-04-22T00:24:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-3600"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/cve-2011-3600"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-3600"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/7793319ae80ec350f7b82a8763460944f120ebe447f14a12155d0550%40%3Ccommits.ofbiz.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/7793319ae80ec350f7b82a8763460944f120ebe447f14a12155d0550@\u003ccommits.ofbiz.apache.org\u003e"
},
{
"type": "WEB",
"url": "https://security-tracker.debian.org/tracker/CVE-2011-3600"
},
{
"type": "WEB",
"url": "http://mail-archives.apache.org/mod_mbox/ofbiz-user/201810.mbox/%3Cfad45546-af86-0293-9ea7-014553474b30%40apache.org%3E"
},
{
"type": "WEB",
"url": "http://mail-archives.apache.org/mod_mbox/ofbiz-user/201810.mbox/%3Cfad45546-af86-0293-9ea7-014553474b30@apache.org%3E"
}
],
"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"
}
]
}
GHSA-8973-52QV-V8P9
Vulnerability from github – Published: 2022-05-24 16:57 – Updated: 2024-04-04 02:07A vulnerability in the web-based interface of Cisco Unified Communications Manager and Cisco Unified Communications Manager Session Management Edition (SME) could allow an unauthenticated, remote attacker to access sensitive information or cause a denial of service (DoS) condition. The vulnerability is due to improper restrictions on XML entities. An attacker could exploit this vulnerability by sending malicious requests to an affected system that contain references in XML entities. A successful exploit could allow the attacker to retrieve files from the local system, resulting in the disclosure of sensitive information, or cause the application to consume available resources, resulting in a DoS condition.
{
"affected": [],
"aliases": [
"CVE-2019-12711"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-10-02T19:15:00Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the web-based interface of Cisco Unified Communications Manager and Cisco Unified Communications Manager Session Management Edition (SME) could allow an unauthenticated, remote attacker to access sensitive information or cause a denial of service (DoS) condition. The vulnerability is due to improper restrictions on XML entities. An attacker could exploit this vulnerability by sending malicious requests to an affected system that contain references in XML entities. A successful exploit could allow the attacker to retrieve files from the local system, resulting in the disclosure of sensitive information, or cause the application to consume available resources, resulting in a DoS condition.",
"id": "GHSA-8973-52qv-v8p9",
"modified": "2024-04-04T02:07:34Z",
"published": "2022-05-24T16:57:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-12711"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-cucm-xxe"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-89F8-292W-GFH4
Vulnerability from github – Published: 2025-11-12 18:31 – Updated: 2025-12-15 15:30N-central versions < 2025.4 are vulnerable to an XML External Entities injection leading to information disclosure
{
"affected": [],
"aliases": [
"CVE-2025-11700"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-12T16:15:35Z",
"severity": "HIGH"
},
"details": "N-central versions \u003c 2025.4 are vulnerable to an XML External Entities injection leading to information disclosure",
"id": "GHSA-89f8-292w-gfh4",
"modified": "2025-12-15T15:30:30Z",
"published": "2025-11-12T18:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-11700"
},
{
"type": "WEB",
"url": "https://me.n-able.com/s/security-advisory/aArVy0000000rabKAA"
},
{
"type": "WEB",
"url": "https://me.n-able.com/s/security-advisory/aArVy0000000rabKAA/cve202511700-ncentral-importservicefromfile-xxe-injection"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-89X6-9566-CFCX
Vulnerability from github – Published: 2022-05-24 17:48 – Updated: 2024-04-04 03:06An XML External Entities (XXE)vulnerability in the web-based user interface of Avaya Aura Orchestration Designer could allow an authenticated, remote attacker to gain read access to information that is stored on an affected system. The affected versions of Orchestration Designer includes all 7.x versions before 7.2.3.
{
"affected": [],
"aliases": [
"CVE-2020-7035"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-04-23T21:15:00Z",
"severity": "MODERATE"
},
"details": "An XML External Entities (XXE)vulnerability in the web-based user interface of Avaya Aura Orchestration Designer could allow an authenticated, remote attacker to gain read access to information that is stored on an affected system. The affected versions of Orchestration Designer includes all 7.x versions before 7.2.3.",
"id": "GHSA-89x6-9566-cfcx",
"modified": "2024-04-04T03:06:25Z",
"published": "2022-05-24T17:48:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7035"
},
{
"type": "WEB",
"url": "https://downloads.avaya.com/css/P8/documents/101075450"
}
],
"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"
}
]
}
GHSA-8C3G-H23M-G7WV
Vulnerability from github – Published: 2022-05-14 03:32 – Updated: 2022-05-14 03:32XML external entity (XXE) vulnerability in IBM InfoSphere Information Governance Catalog 11.3 before 11.3.1.2 and 11.5 before 11.5.0.1 allows remote authenticated users to read arbitrary files or cause a denial of service via crafted XML data. IBM X-Force ID: 110510.
{
"affected": [],
"aliases": [
"CVE-2016-0250"
],
"database_specific": {
"cwe_ids": [
"CWE-611"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-03-12T21:29:00Z",
"severity": "MODERATE"
},
"details": "XML external entity (XXE) vulnerability in IBM InfoSphere Information Governance Catalog 11.3 before 11.3.1.2 and 11.5 before 11.5.0.1 allows remote authenticated users to read arbitrary files or cause a denial of service via crafted XML data. IBM X-Force ID: 110510.",
"id": "GHSA-8c3g-h23m-g7wv",
"modified": "2022-05-14T03:32:45Z",
"published": "2022-05-14T03:32:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-0250"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/110510"
},
{
"type": "WEB",
"url": "http://www-01.ibm.com/support/docview.wss?uid=swg21977152"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L",
"type": "CVSS_V3"
}
]
}
Mitigation
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.