Vulnerabilities CVE-2026-33137

CVE-2026-33137

Critical

Open

TLP:CLEAR

XWiki Platform has an Unauthenticated XAR Import via REST /wikis/{wikiName}

NVD CVE.org

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Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. XWiki Platform is a generic wiki platform. In versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17, the POST /wikis/{wikiName} API executes a XAR import without performing any authentication or authorization checks, allowing an unauthenticated attacker to create or update documents in the target wiki. This vulnerability has been patched in XWiki 16.10.17, 17.4.9, 17.10.3, 18.0.1 and 18.1.0-rc-1.

Details

CVSS Score: 9.3
EPSS Score ⓘ: 0.59%

45.3th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence: 90%
Published: May 20, 2026
Last Modified: May 21, 2026

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