High severity · published Sep 15, 2026
CVE-2026-53966
XWiki Platform: Privilege escalation from edit to script right through Live Data editing
7.1
CVSS
0.8%
EPSS
No
On KEV
Description
XWiki Platform is a generic wiki platform. From 13.4-rc-1 until 16.10.17, 17.4.10, 17.10.4, and 18.1.0-rc-1, the Live Data edit REST API allows a user who can edit a page to change that page's rights without executing the normal document-saving authorization checks. The user can grant script right and then execute potentially dangerous Velocity scripts or send unfiltered HTML and JavaScript to clients. The same missing checks can circumvent extension security controls implemented as listeners for UserUpdatingDocumentEvent and related user document events. This issue is fixed in versions 16.10.17, 17.4.10, 17.10.4, and 18.1.0-rc-1.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XW
xwiki-platform · xwiki
>= 13.4-rc-1, < 16.10.17; >= 17.0.0-rc-1, < 17.4.10; >= 17.5.0-rc-1, < 17.10.4; >= 18.0.0-rc-1, < 18.1.0-rc-1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53966
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53966
github.com
https://github.com/xwiki/xwiki-platform/commit/1ddb954767e50782be960b953b012c1242f6843b
github.com
https://github.com/xwiki/xwiki-platform/commit/448b0f074cc6711410eb2647c4740454c92d1626
github.com
https://github.com/xwiki/xwiki-platform/commit/778b82b4806ce7ebddb775f953545ff73b841f8b
github.com
https://github.com/xwiki/xwiki-platform/commit/fbad7dac8f46c560577e41b9259cbbbbd343e6fc
github.com
https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-16.10.17
github.com
https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.4
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