{
  "GSD": {
    "alias": "CVE-2023-26479",
    "id": "GSD-2023-26479"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-26479"
      ],
      "details": "XWiki Platform is a generic wiki platform. Starting in version 6.0, users with write rights can insert well-formed content that is not handled well by the parser. As a consequence, some pages becomes unusable, including the user index (if the page containing the faulty content is a user page) and the page index. Note that on the page, the normal UI is completely missing and it is not possible to open the editor directly to revert the change as the stack overflow is already triggered while getting the title of the document. This means that it is quite difficult to remove this content once inserted. This has been patched in XWiki 13.10.10, 14.4.6, and 14.9-rc-1. A temporary workaround to avoid Stack Overflow errors is to increase the memory allocated to the stack by using the `-Xss` JVM parameter (e.g., `-Xss32m`). This should allow the parser to pass and to fix the faulty content. The consequences for other aspects of the system (e.g., performance) are unknown, and this workaround should be only be used as a temporary solution. The workaround does not prevent the issue occurring again with other content. Consequently, it is strongly advised to upgrade to a version where the issue has been patched.",
      "id": "GSD-2023-26479",
      "modified": "2023-12-13T01:20:54.037231Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
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        "ID": "CVE-2023-26479",
        "STATE": "PUBLIC"
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      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
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      "description": {
        "description_data": [
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            "lang": "eng",
            "value": "XWiki Platform is a generic wiki platform. Starting in version 6.0, users with write rights can insert well-formed content that is not handled well by the parser. As a consequence, some pages becomes unusable, including the user index (if the page containing the faulty content is a user page) and the page index. Note that on the page, the normal UI is completely missing and it is not possible to open the editor directly to revert the change as the stack overflow is already triggered while getting the title of the document. This means that it is quite difficult to remove this content once inserted. This has been patched in XWiki 13.10.10, 14.4.6, and 14.9-rc-1. A temporary workaround to avoid Stack Overflow errors is to increase the memory allocated to the stack by using the `-Xss` JVM parameter (e.g., `-Xss32m`). This should allow the parser to pass and to fix the faulty content. The consequences for other aspects of the system (e.g., performance) are unknown, and this workaround should be only be used as a temporary solution. The workaround does not prevent the issue occurring again with other content. Consequently, it is strongly advised to upgrade to a version where the issue has been patched."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-755",
                "lang": "eng",
                "value": "CWE-755: Improper Handling of Exceptional Conditions"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-52vf-hvv3-98h7",
            "refsource": "MISC",
            "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-52vf-hvv3-98h7"
          },
          {
            "name": "https://github.com/xwiki/xwiki-platform/commit/e5b82cd98072464196a468b8f7fe6396dce142a7",
            "refsource": "MISC",
            "url": "https://github.com/xwiki/xwiki-platform/commit/e5b82cd98072464196a468b8f7fe6396dce142a7"
          },
          {
            "name": "https://jira.xwiki.org/browse/XWIKI-19838",
            "refsource": "MISC",
            "url": "https://jira.xwiki.org/browse/XWIKI-19838"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-52vf-hvv3-98h7",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "[6.0,13.10.10),[14.0,14.4.6),[14.5,14.9-rc-1)",
          "affected_versions": "All versions starting from 6.0 before 13.10.10, all versions starting from 14.0 before 14.4.6, all versions starting from 14.5 before 14.9-rc-1",
          "cwe_ids": [
            "CWE-1035",
            "CWE-79",
            "CWE-937"
          ],
          "date": "2023-03-03",
          "description": "XWiki Platform is a generic wiki platform. Starting in version 6.0, users with write rights can insert well-formed content that is not handled well by the parser. As a consequence, some pages becomes unusable, including the user index (if the page containing the faulty content is a user page) and the page index. Note that on the page, the normal UI is completely missing and it is not possible to open the editor directly to revert the change as the stack overflow is already triggered while getting the title of the document. This means that it is quite difficult to remove this content once inserted. This has been patched in XWiki 13.10.10, 14.4.6, and 14.9-rc-1. A temporary workaround to avoid Stack Overflow errors is to increase the memory allocated to the stack by using the `-Xss` JVM parameter (e.g., `-Xss32m`). This should allow the parser to pass and to fix the faulty content. The consequences for other aspects of the system (e.g., performance) are unknown, and this workaround should be only be used as a temporary solution. The workaround does not prevent the issue occurring again with other content. Consequently, it is strongly advised to upgrade to a version where the issue has been patched.",
          "fixed_versions": [
            "13.10.10",
            "14.4.6",
            "14.9-rc-1"
          ],
          "identifier": "CVE-2023-26479",
          "identifiers": [
            "GHSA-52vf-hvv3-98h7",
            "CVE-2023-26479"
          ],
          "not_impacted": "All versions before 6.0, all versions starting from 13.10.10 before 14.0, all versions starting from 14.4.6 before 14.5, all versions starting from 14.9-rc-1",
          "package_slug": "maven/org.xwiki.platform/xwiki-platform-rendering-parser",
          "pubdate": "2023-03-03",
          "solution": "Upgrade to versions 13.10.10, 14.4.6, 14.9-rc-1 or above. *Note*: 14.9-rc-1 may be an unstable version. Use caution.",
          "title": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
          "urls": [
            "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-52vf-hvv3-98h7",
            "https://nvd.nist.gov/vuln/detail/CVE-2023-26479",
            "https://github.com/xwiki/xwiki-platform/commit/e5b82cd98072464196a468b8f7fe6396dce142a7",
            "https://jira.xwiki.org/browse/XWIKI-19838",
            "https://github.com/advisories/GHSA-52vf-hvv3-98h7"
          ],
          "uuid": "ceeeb660-d04d-46b4-99cc-181879205b37"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "14.9",
                "versionStartIncluding": "14.5",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*",
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                "versionEndExcluding": "14.4.6",
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                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "13.10.10",
                "versionStartIncluding": "6.0",
                "vulnerable": true
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      "cve": {
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          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2023-26479"
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        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "XWiki Platform is a generic wiki platform. Starting in version 6.0, users with write rights can insert well-formed content that is not handled well by the parser. As a consequence, some pages becomes unusable, including the user index (if the page containing the faulty content is a user page) and the page index. Note that on the page, the normal UI is completely missing and it is not possible to open the editor directly to revert the change as the stack overflow is already triggered while getting the title of the document. This means that it is quite difficult to remove this content once inserted. This has been patched in XWiki 13.10.10, 14.4.6, and 14.9-rc-1. A temporary workaround to avoid Stack Overflow errors is to increase the memory allocated to the stack by using the `-Xss` JVM parameter (e.g., `-Xss32m`). This should allow the parser to pass and to fix the faulty content. The consequences for other aspects of the system (e.g., performance) are unknown, and this workaround should be only be used as a temporary solution. The workaround does not prevent the issue occurring again with other content. Consequently, it is strongly advised to upgrade to a version where the issue has been patched."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-755"
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://jira.xwiki.org/browse/XWIKI-19838",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Issue Tracking",
                "Vendor Advisory"
              ],
              "url": "https://jira.xwiki.org/browse/XWIKI-19838"
            },
            {
              "name": "https://github.com/xwiki/xwiki-platform/commit/e5b82cd98072464196a468b8f7fe6396dce142a7",
              "refsource": "MISC",
              "tags": [
                "Patch"
              ],
              "url": "https://github.com/xwiki/xwiki-platform/commit/e5b82cd98072464196a468b8f7fe6396dce142a7"
            },
            {
              "name": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-52vf-hvv3-98h7",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Vendor Advisory"
              ],
              "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-52vf-hvv3-98h7"
            }
          ]
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      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-03-10T05:03Z",
      "publishedDate": "2023-03-02T18:15Z"
    }
  }
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-rendering-parser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0"
            },
            {
              "fixed": "13.10.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-rendering-parser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "14.0"
            },
            {
              "fixed": "14.4.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-rendering-parser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "14.5"
            },
            {
              "fixed": "14.9-rc-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-26479"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-755"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-03-03T22:53:35Z",
    "nvd_published_at": "2023-03-02T18:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nUsers with write rights can insert well-formed content that is not handled well by the parser. For instance, with `xwiki/2.1`, inserting a deeply nested group blocks (`((( ((( ((( ((( .... ))) ))) ))) )))` (see the generator below to produce a large payload) can lead to the parser throwing a `StackOverflowError`.\nAs a consequence, some pages becomes unusable, including:\n- the user index (if the page containing the faulty content is a user page)\n- the page index\n\nNote that on the page, the normal UI is completely missing and it is not possible to open the editor directly to revert the change as the stack overflow is already triggered while getting the title of the document. This means that it is quite difficult to remove this content once inserted.\n\n### Patches\nThis has been patched on XWiki 13.10.10, 14.4.6, and 14.9-rc-1.\n\n### Workarounds\nA temporary solution to avoid Stack Overflow errors is to increase the memory allocated to the stack by using the `-Xss` JVM parameter (e.g., `-Xss32m`). This should allow the parser to pass and to fix the faulty content.\nNote that we did not evaluated the consequence on other aspects of the system (e.g., performances), and should be only be used as a temporary solution.\nAlso, this does not prevent the issue to occur again with another content.\nConsequently, it is strongly advised to upgrade to a version where the issue has been patched.\n\n### References\n- https://jira.xwiki.org/browse/XWIKI-19838\n\n### For more information\nIf you have any questions or comments about this advisory:\n- Open an issue in [Jira](http://jira.xwiki.org/)\n- Email us at [Security ML](mailto:security@xwiki.org)\n\n### Payload Generator\n\nThe Javascript code below produces 32768 nested group blocks, around the `Hello` text.\n\n```javascript\nlet result = \"(((\\nHello\\n)))\";\nfor (let i = 0; i \u003c 15; ++i) {\n  result = result.replace(\"Hello\", result);\n}\nconsole.log(result);\n```\n",
  "id": "GHSA-52vf-hvv3-98h7",
  "modified": "2023-03-03T22:53:35Z",
  "published": "2023-03-03T22:53:35Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-52vf-hvv3-98h7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26479"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/commit/e5b82cd98072464196a468b8f7fe6396dce142a7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xwiki/xwiki-platform"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XWIKI-19838"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "xwiki vulnerable to Improper Handling of Exceptional Conditions"
}