Description
XWiki Platform is a generic wiki platform. Starting in version 12.9-rc-1 and prior to versions 14.4.8, 14.10.6, and 15.1, any logged in user can add dangerous content in their first name field and see it executed with programming rights. Leading to rights escalation. The vulnerability has been fixed on XWiki 14.4.8, 14.10.6, and 15.1. As a workaround, one may apply the patch manually.
Remediation
References
https://github.com/xwiki/xwiki-platform/commit/0993a7ab3c102f9ac37ffe361a83a3dc302c0e45#diff-0b51114cb27f7a5c599cf40c59d658eae6ddc5c0836532c3b35e163f40a4854fR39
https://github.com/xwiki/xwiki-platform/commit/6ce2d04a5779e07f6d3ed3f37d4761049b4fc3ac#diff-ef7f8b911bb8e584fda22aac5876a329add35ca0d1d32e0fdb62a439b78cfa49
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-rf8j-q39g-7xfm
https://jira.xwiki.org/browse/XWIKI-19900
https://jira.xwiki.org/browse/XWIKI-20611
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