CVE-2025-32972: The lesscss script service allows cache clearing without programming right

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-30 · updated 2026-06-17
Weakness: CWE-285

Description

XWiki is a generic wiki platform. In versions starting from 6.1-milestone-1 to before 15.10.12, from 16.0.0-rc-1 to before 16.4.3, and from 16.5.0-rc-1 to before 16.8.0-rc-1, the script API of the LESS compiler in XWiki is incorrectly checking for rights when calling the cache cleaning API, making it possible to clean the cache without having programming right. The only impact of this is a slowdown in XWiki execution as the caches are re-filled. As this vulnerability requires script right to exploit, and script right already allows unlimited execution of scripts, the additional impact due to this vulnerability is low. This issue has been patched in versions 15.10.12, 16.4.3, and 16.8.0-rc-1.

Affected products

xwiki-platform: from 6.2 before 15.10.12; from 16.0.0 before 16.4.3; from 16.5.0 before 16.8.0; 6.1, 6.1-milestone1, 6.1-milestone2, 6.1-rc1 — fixed in 15.10.12, 16.4.3, 16.8.0

How to fix

Upgrade to a fixed version: xwiki-platform 15.10.12, 16.4.3, 16.8.0. Check the vendor advisory for mitigations.

References

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