CVE-2026-34151

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.

CVSS

No CVSS.

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-14 18:17

Updated : 2026-09-14 19:17

NVD link : CVE-2026-34151

Mitre link : CVE-2026-34151

CVE.ORG link : CVE-2026-34151

JSON object : View

Products Affected

No product.

CWE

CWE-24

Path Traversal: '../filedir'

{"id": "CVE-2026-34151", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34151", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-14T18:56:04.582032Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "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/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "xwiki", "product": "xwiki-platform", "versions": [{"status": "affected", "version": "< 17.10.5"}, {"status": "affected", "version": ">= 18.0.0-rc-1, < 18.2.0"}]}]}], "published": "2026-09-14T18:17:47.107", "references": [{"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", "source": "security-advisories@github.com"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-24"}]}], "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."}], "lastModified": "2026-09-14T19:17:19.853", "sourceIdentifier": "security-advisories@github.com"}