CVE-2024-31996 – XWiki Commons missing escaping of `{` in Velocity escapetool allows remote code execution

https://notcve.org/view.php?id=CVE-2024-31996

XWiki Platform is a generic wiki platform. Starting in version 3.0.1 and prior to versions 4.10.19, 15.5.4, and 15.10-rc-1, the HTML escaping of escaping tool that is used in XWiki doesn't escape `{`, which, when used in certain places, allows XWiki syntax injection and thereby remote code execution. The vulnerability has been fixed in XWiki 14.10.19, 15.5.5, and 15.9 RC1. Apart from upgrading, there is no generic workaround. However, replacing `$escapetool.html` by `$escapetool.xml` in XWiki documents fixes the vulnerability. • https://github.com/xwiki/xwiki-commons/commit/b0805160ec7b01ee12417e79cb384e60ae4817aa https://github.com/xwiki/xwiki-commons/commit/b94142e2a66ec32e89eacab67c3da8d91f5ef93a https://github.com/xwiki/xwiki-commons/commit/ed7ff515a2436a1c6dcbd0c6ca0c41e434d58915 https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-hf43-47q4-fhq5 https://jira.xwiki.org/browse/XCOMMONS-2828 https://jira.xwiki.org/browse/XWIKI-21438 • CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') •