CVE-2023-26477 org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability
Attackers can inject arbitrary Groovy, Python, or Velocity scripts via the newThemeName URL parameter in XWiki Platform, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-26477?
CVE-2023-26477 is a critical code injection vulnerability in Xwiki Xwiki, published on 2 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the `newThemeName` request parameter (URL parameter), in combination with additional parameters. This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6. As a workaround, it is possible to edit `FlamingoThemesCode.WebHomeSheet` and manually perform the changes from the patch fixing the issue.
Which versions are affected by CVE-2023-26477?
6 open source packages ship an affected version, including org.xwiki.platform:xwiki-platform-flamingo-theme-ui. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Maven | From 14.0 | 14.4.6 |
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Maven | From 14.0 | 14.4.6 |
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Maven | From 14.5 | 14.9-rc-1 |
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Maven | From 14.5 | 14.9-rc-1 |
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Maven | From 6.2.4 | 13.10.10 |
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Maven | From 6.2.4 | 13.10.10 |
Products include Xwiki Xwiki.
How do I fix CVE-2023-26477?
Upgrade org.xwiki.platform:xwiki-platform-flamingo-theme-ui to a fixed version for your release line: 14.4.6, 14.9-rc-1 or 13.10.10.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2023-26477 being exploited?
There is no known exploitation of CVE-2023-26477 in the wild and no public exploit code.
Other vulnerabilities in Xwiki Xwiki
- CVE-2025-24893 XWiki Platform Eval Injection
- CVE-2025-53836 XWiki Rendering is vulnerable to RCE attacks when processing nested macros
- CVE-2024-55662 XWiki allows remote code execution through the extension sheet
- CVE-2024-55877 XWiki allows remote code execution from account through macro descriptions and XWiki.XWikiSyntaxMacrosList
- CVE-2024-37901 XWiki Platform vulnerable to remote code execution from account via SearchSuggestConfigSheet
Sources
Also known as GHSA-x2qm-r4wx-8gpg.