GHSA-pwfv-3cvg-9m4c org.xwiki.platform:xwiki-platform-oldcore makes Incorrect Use of Privileged APIs with DocumentAuthors

• Maven org.xwiki.platform:xwiki-platform-oldcore: >= 14.5, < 14.10 → fixed in 14.10 • Maven org.xwiki.platform:xwiki-platform-oldcore: >= 14.4.1, < 14.4.7 → fixed in 14.4.7

Impact The Document script API returns directly a DocumentAuthors allowing to set any authors to the document, which in consequence can allow subsequent executions of scripts since this author is used for checking rights. Example of such attack: ``` {{velocity}} $doc.setContent('{{velocity}}$xcontext.context.authorReference{{/velocity}}') $doc.authors.setContentAuthor('xwiki:XWiki.superadmin') $doc.getRenderedContent() {{/velocity}} ``` Patches The problem has been patched in XWiki 14.10 and 14.4.7 by returning a safe script API. Workarounds There no easy workaround apart of upgrading. References • https://jira.xwiki.org/browse/XWIKI-20380 • https://github.com/xwiki/xwiki-platform/commit/905cdd7c421dbf8c565557cdc773ab1aa9028f83 For more information If you have any questions or comments about this advisory: • Open an issue in Jira • Email us at security ML