Vulnerability-Lookup

GHSA-QJ4X-9G63-25G6

Vulnerability from github – Published: 2026-07-07 13:01 – Updated: 2026-07-07 13:01

Summary

XWiki Platform Old Core: Resource path traversal via /skin/ action endpoint in Jetty 12+

Details

Impact

With Jetty 12+ a user can craft a URL to access any resource the Jetty instance is allowed to access.

For example http://[host]/xwiki/bin/skin/..%252f/..%252f..%252f..%252f..%252f..%252f..%252f..%252fetc/passwd allows downloading the content of the /etc/passwd file, provided Jetty is allowed to read it, and if your XWiki webapp is located exactly 5 levels below / (like /var/lib/jetty/webapps/xwiki, which is the case in the docker image, for example).

Another example which does not go out of the XWiki webapp, but it's still a vulnerability (since users should not be allowed to access Hibernate or XWiki configuration files) is http://[host]/xwiki/bin/skin/..%252f/..%252fWEB-INF/xwiki.cfg.

Patches

This vulnerability has been patched in XWiki 17.10.5 and 18.2.0.

Workarounds

A possible workaround is to use a different application server, like Jetty < 12 (in the case of XWiki < 17) or Tomcat, which don't seem to be impacted.

Resources

https://jira.xwiki.org/browse/XWIKI-24075
https://jira.xwiki.org/browse/XCOMMONS-3594

For more information

If there are any questions or comments about this advisory: * Open an issue in Jira XWiki.org * Send an email to the Security Mailing List

Attribution

Lê Ngọc Khoa reported the vulnerability.

Severity

8.2 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-oldcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "17.10.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-oldcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "18.0.0-rc-1"
            },
            {
              "fixed": "18.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34151"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-24"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-07T13:01:21Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n\nWith Jetty 12+ a user can craft a URL to access any resource the Jetty instance is allowed to access.\n\nFor example `http://[host]/xwiki/bin/skin/..%252f/..%252f..%252f..%252f..%252f..%252f..%252f..%252fetc/passwd` allows downloading the content of the /etc/passwd file, provided Jetty is allowed to read it, and if your XWiki webapp is located exactly 5 levels below `/` (like `/var/lib/jetty/webapps/xwiki`, which is the case in the docker image, for example).\n\nAnother example which does not go out of the XWiki webapp, but it\u0027s still a vulnerability (since users should not be allowed to access Hibernate or XWiki configuration files) is `http://[host]/xwiki/bin/skin/..%252f/..%252fWEB-INF/xwiki.cfg`.\n\n### Patches\n\nThis vulnerability has been patched in XWiki 17.10.5 and 18.2.0.\n\n### Workarounds\n\nA possible workaround is to use a different application server, like Jetty \u003c 12 (in the case of XWiki \u003c 17) or Tomcat, which don\u0027t seem to be impacted.\n\n### Resources\n\n* https://jira.xwiki.org/browse/XWIKI-24075\n* https://jira.xwiki.org/browse/XCOMMONS-3594\n\n### For more information\n\nIf there are any questions or comments about this advisory:\n* Open an issue in [Jira XWiki.org](https://jira.xwiki.org/)\n* Send an email to the [Security Mailing List](mailto:security@xwiki.org)\n\n### Attribution\n\n L\u00ea Ng\u1ecdc Khoa reported the vulnerability.",
  "id": "GHSA-qj4x-9g63-25g6",
  "modified": "2026-07-07T13:01:22Z",
  "published": "2026-07-07T13:01:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-commons/pull/1675"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xwiki/xwiki-platform"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XCOMMONS-3594"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XWIKI-24075"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "XWiki Platform Old Core: Resource path traversal via /skin/ action endpoint in Jetty 12+"
}

CVE-2026-34151 (GCVE-0-2026-34151)

Vulnerability from cvelistv5 – Published: 2026-09-14 17:12 – Updated: 2026-09-14 18:56

Title

XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+

Summary

XWiki Platform is a generic wiki platform. Prior to 17.10.5 and 18.2.0, the /skin/ action in com.xpn.xwiki.web.SkinAction can resolve double-encoded parent-directory segments outside the intended skin or web-application resource prefix when Jetty 12 or later decodes the request path. The affected lookup is replaced with Environment.getResourceAsStream(String, String), which constrains a resource to its expected prefix. An unauthenticated remote attacker can use the vulnerable behavior to read arbitrary resources permitted to the Jetty process, including WEB-INF/xwiki.cfg and, depending on deployment depth and operating-system permissions, host files. Tomcat and Jetty versions before 12 do not appear affected. This issue is fixed in versions 17.10.5 and 18.2.0.

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 18:56 UTC

CWE

CWE-24 - Path Traversal: '../filedir'

Assigner

GitHub_M mitre root

References

8 references

URL	Tags
https://github.com/xwiki/xwiki-platform/security/…	x_refsource_CONFIRM
https://github.com/xwiki/xwiki-commons/pull/1675	x_refsource_MISC
https://github.com/xwiki/xwiki-platform/commit/79…	x_refsource_MISC
https://github.com/xwiki/xwiki-platform/commit/f7…	x_refsource_MISC
https://github.com/xwiki/xwiki-platform/releases/…	x_refsource_MISC
https://github.com/xwiki/xwiki-platform/releases/…	x_refsource_MISC
https://jira.xwiki.org/browse/XCOMMONS-3594	x_refsource_MISC
https://jira.xwiki.org/browse/XWIKI-24075	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
xwiki	xwiki-platform	Affected: < 17.10.5 Affected: >= 18.0.0-rc-1, < 18.2.0

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34151",
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                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-14T18:56:04.582032Z",
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          "dateUpdated": "2026-09-14T18:56:11.951Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "product": "xwiki-platform",
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          "versions": [
            {
              "status": "affected",
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            },
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              "status": "affected",
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            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "XWiki Platform is a generic wiki platform. Prior to 17.10.5 and 18.2.0, the /skin/ action in com.xpn.xwiki.web.SkinAction can resolve double-encoded parent-directory segments outside the intended skin or web-application resource prefix when Jetty 12 or later decodes the request path. The affected lookup is replaced with Environment.getResourceAsStream(String, String), which constrains a resource to its expected prefix. An unauthenticated remote attacker can use the vulnerable behavior to read arbitrary resources permitted to the Jetty process, including WEB-INF/xwiki.cfg and, depending on deployment depth and operating-system permissions, host files. Tomcat and Jetty versions before 12 do not appear affected. This issue is fixed in versions 17.10.5 and 18.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-24",
              "description": "CWE-24: Path Traversal: \u0027../filedir\u0027",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T17:12:18.814Z",
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      "references": [
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          "name": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6",
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          "tags": [
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          "tags": [
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          "url": "https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5"
        },
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          "name": "https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0"
        },
        {
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        },
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://jira.xwiki.org/browse/XWIKI-24075"
        }
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        "advisory": "GHSA-qj4x-9g63-25g6",
        "discovery": "UNKNOWN"
      },
      "title": "XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-34151",
    "datePublished": "2026-09-14T17:12:18.814Z",
    "dateReserved": "2026-03-25T20:12:04.196Z",
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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