XWiki Platform vulnerable to privilege escalation via async macro and IconThemeSheet from the user profile
ImpactOne can execute any wiki content with the right of IconThemeSheet author by creating an icon theme with the following content:Can be done by creating a new page or even through the user profile for users not having edit right.PatchesThis has been patched in XWiki 14.9, 14.4.6, and 13.10.10.WorkaroundsAn 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-2ec9d716673ee049937219cdb0a92e520f81da14ea84d144504b97ab2bdae243R45Referenceshttps://jira.xwiki.org/browse/XWIKI-19731For more informationIf you have any questions or comments about this advisory:Open an issue in [Jira](http://jira.xwiki.org)Email us at [Security ML](mailto:security@xwiki.org)