GHSA-rmxw-c48h-2vf5 XWiki Platform privilege escalation from script right to programming right through title displayer

• Maven org.xwiki.platform:xwiki-platform-display-api: >= 3.2-milestone-3, < 14.10.7 → fixed in 14.10.7 • Maven org.xwiki.platform:xwiki-platform-display-api: >= 15.0, < 15.2-rc-1 → fixed in 15.2-rc-1

Impact In XWiki Platform, it's possible for a user to write a script in which any velocity content is executed with the right of any other document content author. To reproduce: As a user with script but not programming right, create a document with the following content: ``` {{velocity}} set($main = $xwiki.getDocument('AppWithinMinutes.DynamicMessageTool')) $main.setTitle('$doc.getDocument().getContentAuthor()') $main.getPlainTitle() {{/velocity}} ``` Since this API require programming right and the user does not have it, the expected result is `$doc.document.authors.contentAuthor` (not executed script), unfortunately with the security vulnerability we get `XWiki.superadmin` which shows that the title was executed with the right of the unmodified document. Patches This has been patched in XWiki 14.10.7 and 15.2-RC-1. Workarounds There are no known workarounds for it. References • https://jira.xwiki.org/browse/XWIKI-20624 • https://github.com/xwiki/xwiki-platform/commit/11a9170dfe63e59f4066db67f84dbfce4ed619c6 • https://jira.xwiki.org/browse/XWIKI-20625 • https://github.com/xwiki/xwiki-platform/commit/41d7dca2d30084966ca6a7ee537f39ee8354a7e3 For more information If you have any questions or comments about this advisory: • Open an issue in Jira XWiki.org • Email us at Security Mailing List