Answer in brief
CVE-2023-26477 records a Critical severity (CVSS 10.0) vulnerability in org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability. The current sources do not mark it as known exploited. The current feed maps org.xwiki.platform:xwiki-platform-flamingo-theme-ui (maven), org.xwiki.platform:xwiki-platform-flamingo-theme-ui (maven), org.xwiki.platform:xwiki-platform-flamingo-theme-ui (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 10.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.xwiki.platform:xwiki-platform-flamingo-theme-ui (maven), org.xwiki.platform:xwiki-platform-flamingo-theme-ui (maven), org.xwiki.platform:xwiki-platform-flamingo-theme-ui (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.xwiki.platform:xwiki-platform-flamingo-theme-uimaven | >=6.2.4 <13.10.10 | 13.10.10 |
| org.xwiki.platform:xwiki-platform-flamingo-theme-uimaven | >=14.0 <14.4.6 | 14.4.6 |
| org.xwiki.platform:xwiki-platform-flamingo-theme-uimaven | >=14.5 <14.9-rc-1 | 14.9-rc-1 |
Published upstream
Mar 3, 2023
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Sep 10, 2026
### Impact 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 `form_token=1&action=create`. For instance: [http://127.0.0.1:8080/xwiki/bin/view/FlamingoThemesCode/WebHomeSheet?newThemeName=foo%22%2F%7D%7D%7B%7Basync%20async%3D%22true%22%20cached%3D%22false%22%20context%3D%22doc.reference%22%7D%7D%7B%7Bgroovy%7D%7Dprintln(%22hello%20from%20groovy!%22)%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D&form_token=1&action=create](http://127.0.0.1:8080/xwiki/bin/view/FlamingoThemesCode/WebHomeSheet?**newThemeName**=foo%22%2F%7D%7D%7B%7Basync%20async%3D%22true%22%20cached%3D%22false%22%20context%3D%22doc.reference%22%7D%7D%7B%7Bgroovy%7D%7Dprintln(%22hello%20from%20groovy!%22)%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D&form_token=1&action=create) will execute the following groovy code: `println("hello from groovy!")` on the server. ### Patches This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6. ### Workarounds It is possible to edit `FlamingoThemesCode.WebHomeSheet` and manually perform the changes from [the patch fixing the issue](https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284). ### References - https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284 - https://jira.xwiki.org/browse/XWIKI-19757 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki.org](https://jira.xwiki.org/) * Email us at [Security Mailing List](mailto:[email protected])
Quoted source text, attributed separately from HOL analysis.