{"id":"CVE-2023-26477","aliases":["GHSA-x2qm-r4wx-8gpg"],"url":"https://o3.security/vulnerability/CVE-2023-26477","summary":"org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability","details":"### Impact\nIt'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`.\n\nFor 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.\n\n### Patches\nThis has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6.\n\n### Workarounds\nIt 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).\n\n### References\n- https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284\n- https://jira.xwiki.org/browse/XWIKI-19757\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [Jira XWiki.org](https://jira.xwiki.org/)\n* Email us at [Security Mailing List](mailto:security@xwiki.org)\n","published":"2023-03-02T17:52:40.359Z","modified":"2026-10-28T02:30:45.967040426Z","cvss":{"score":10,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-flamingo-theme-ui","fixedVersion":"13.10.10"},{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-flamingo-theme-ui","fixedVersion":"14.4.6"},{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-flamingo-theme-ui","fixedVersion":"14.9-rc-1"}],"fix":{"url":"https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284","label":"xwiki/xwiki-platform@ea2e615"},"references":[{"type":"WEB","url":"https://jira.xwiki.org/browse/XWIKI-19757"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26477.json"},{"type":"ADVISORY","url":"https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26477"},{"type":"FIX","url":"https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284"},{"type":"PACKAGE","url":"https://github.com/xwiki/xwiki-platform"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:45.967040426Z"}}