CVE-2023-29202 org.xwiki.platform:xwiki-platform-rendering-macro-rss Cross-site Scripting vulnerability

What is CVE-2023-29202?

CVE-2023-29202 is a critical cross-site scripting vulnerability in Xwiki Xwiki, published on 15 Apr 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

XWiki Commons are technical libraries common to several other top level XWiki projects. The RSS macro that is bundled in XWiki included the content of the feed items without any cleaning in the HTML output when the parameter `content` was set to `true`. This allowed arbitrary HTML and in particular also JavaScript injection and thus cross-site scripting (XSS) by specifying an RSS feed with malicious content. With the interaction of a user with programming rights, this could be used to execute arbitrary actions in the wiki, including privilege escalation, remote code execution, information disclosure, modifying or deleting content and sabotaging the wiki. The issue has been patched in XWiki 14.6 RC1, the content of the feed is now properly cleaned before being displayed. As a workaround, if the RSS macro isn't used in the wiki, the macro can be uninstalled by deleting `WEB-INF/lib/xwiki-platform-rendering-macro-rss-XX.jar`, where `XX` is XWiki's version, in the web application's directory.

Weakness: CWE-79

Which versions are affected by CVE-2023-29202?

4 open source packages ship an affected version, including org.xwiki.platform:xwiki-core-rendering-macro-rss and org.xwiki.platform:xwiki-platform-rendering-macro-rss. It affects 1 product.

Products include Xwiki Xwiki.

How do I fix CVE-2023-29202?

Apply the vendor's patch.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-29202 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-29202 exists.

Other vulnerabilities in Xwiki Xwiki

• CVE-2025-24893 XWiki Platform Eval Injection Exploited Critical 9.8
• CVE-2025-53836 XWiki Rendering is vulnerable to RCE attacks when processing nested macros Critical 10.0
• CVE-2024-55662 XWiki allows remote code execution through the extension sheet Critical 10.0
• CVE-2024-55877 XWiki allows remote code execution from account through macro descriptions and XWiki.XWikiSyntaxMacrosList Critical 10.0
• CVE-2024-37901 XWiki Platform vulnerable to remote code execution from account via SearchSuggestConfigSheet Critical 10.0

All Xwiki Xwiki vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c885-89fw-55qr.