Missing Authorization in XWiki platform - CVE-2026-33137
Published: May 21, 2026
Vulnerability identifier: #VU132084
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33137
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to create or update documents in the target wiki.
The vulnerability exists due to missing authorization in the REST /wikis/{wikiName} endpoint when handling POST requests that trigger XAR import. A remote attacker can send a crafted POST request to create or update documents in the target wiki.
Affected software
XWiki platform
How to mitigate CVE-2026-33137
Install security update from vendor's website.
XWiki platform - addressed in versions 16.10.17, 17.4.9, 17.10.3, 18.0.1, 18.1.0