Vulnerability-Lookup

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	CPE status
xwiki	xwiki-platform	Affected: < 17.10.5 Affected: >= 18.0.0-rc-1, < 18.2.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-34151

Vulnerability from fkie_nvd - Published: 2026-09-14 18:17 - Updated: 2026-09-14 19:17

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/xwiki/xwiki-commons/pull/1675
	security-advisories@github.com	https://github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d20a82383
	security-advisories@github.com	https://github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c66855f85
	security-advisories@github.com	https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5
	security-advisories@github.com	https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0
	security-advisories@github.com	https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6
	security-advisories@github.com	https://jira.xwiki.org/browse/XCOMMONS-3594
	security-advisories@github.com	https://jira.xwiki.org/browse/XWIKI-24075

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "xwiki-platform",
          "vendor": "xwiki",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 17.10.5"
            },
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            }
          ]
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    }
  ],
  "id": "CVE-2026-34151",
  "lastModified": "2026-09-14T19:17:19.853",
  "metrics": {
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          "Recovery": "NOT_DEFINED",
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          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
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              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-14T18:56:04.582032Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-14T18:17:47.107",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xwiki/xwiki-commons/pull/1675"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d20a82383"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c66855f85"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://jira.xwiki.org/browse/XCOMMONS-3594"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://jira.xwiki.org/browse/XWIKI-24075"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-24"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

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

Show details on source website

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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+"
}

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.

Action not permitted

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

FKIE_CVE-2026-34151

GHSA-QJ4X-9G63-25G6

Impact

Patches

Workarounds

Resources

For more information

Attribution

Tags

Sightings

Nomenclature