GHSA-9j36-3cp4-rh4j XWiki vulnerable to Code Injection in template provider administration

• Maven org.xwiki.platform.applications:xwiki-application-administration: >= 1.35, <= 1.49 (no fix yet) • Maven org.xwiki.platform:xwiki-platform-administration: < 4.2-milestone-1 (no fix yet) • Maven org.xwiki.platform:xwiki-platform-administration-ui: >= 4.2-milestone-1, < 13.10.11 → fixed in 13.10.11 • Maven org.xwiki.platform:xwiki-platform-administration-ui: >= 14.0-rc-1, < 14.4.8 → fixed in 14.4.8 • Maven org.xwiki.platform:xwiki-platform-administration-ui: >= 14.5, < 14.10.1 → fixed in 14.10.1

Impact Any user with edit rights on any document (e.g., the own user profile) can execute code with programming rights, leading to remote code execution by following these steps: 1. Set the title of any document you can edit (can be the user profile) to ``` {{async async="true" cached="false" context="doc.reference"}}{{groovy}}println("Hello " + "from groovy!"){{/groovy}}{{/async}} ``` 2. Use the object editor to add an object of type `XWiki.TemplateProviderClass` (named "Template Provider Class") to that document. 3. Go to another document you can view (can be the home page) and append `?sheet=XWiki.AdminTemplatesSheet` to the URL. When the attack is successful, a template with name "Hello from groovy!" is displayed in the list while on fixed systems, the full title should be displayed. Patches This vulnerability has been patched in XWiki 13.10.11, 14.4.8, 14.10.1 and 15.0 RC1. Workarounds The vulnerability can be fixed by patching the code in the affected XWiki document as shown in the patch. References • https://jira.xwiki.org/browse/XWIKI-20268 • https://github.com/xwiki/xwiki-platform/commit/7bf7094f8ffac095f5d66809af7554c9cc44de09 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