GHSA-vwr6-qp4q-2wj7 XWiki Platform vulnerable to privilege escalation via async macro and IconThemeSheet from the user profile

• Maven org.xwiki.platform:xwiki-platform-icon-ui: >= 6.2-milestone-1, < 13.10.10 → fixed in 13.10.10 • Maven org.xwiki.platform:xwiki-platform-icon-ui: >= 14.0, < 14.4.6 → fixed in 14.4.6 • Maven org.xwiki.platform:xwiki-platform-icon-ui: >= 14.5, < 14.9 → fixed in 14.9

Impact One can execute any wiki content with the right of IconThemeSheet author by creating an icon theme with the following content: ``` }}} {{async async="true"}} {{groovy}} println("Hello from Groovy!") {{/groovy}} {{/async}} {{{ ``` Can be done by creating a new page or even through the user profile for users not having edit right. Patches This has been patched in XWiki 14.9, 14.4.6, and 13.10.10. Workarounds An easy workaround is to actually fix the bug in the page `IconThemesCode.IconThemeSheet` by applying the following modification: https://github.com/xwiki/xwiki-platform/commit/48caf7491595238af2b531026a614221d5d61f38#diff-2ec9d716673ee049937219cdb0a92e520f81da14ea84d144504b97ab2bdae243R45 References https://jira.xwiki.org/browse/XWIKI-19731 For more information If you have any questions or comments about this advisory: • Open an issue in Jira • Email us at Security ML