CVE-2023-26477
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability
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.
- Record
CVE-2023-26477- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-95
- Updated
- 2026-11-02
EUVDEUVD-2023-1137
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.
- Record
EUVD-2023-1137- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-x2qm-r4wx-8gpg
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability
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 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.
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
- Email us at Security Mailing List
- Record
GHSA-x2qm-r4wx-8gpg- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-94, CWE-95
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2023-26477- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-95, CWE-94
- Updated
- 2026-11-02
OSV
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability
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.
- Record
CVE-2023-26477- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-95
- Updated
- 2026-11-02
OSVGHSA-x2qm-r4wx-8gpg
org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability
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 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.
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
- Email us at Security Mailing List
- Record
GHSA-x2qm-r4wx-8gpg- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-94, CWE-95
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.xwiki.platform:xwiki-platform-flamingo-theme-uiMaven |
6.2.4 up to 13.10.10 | 13.10.10 |
org.xwiki.platform:xwiki-platform-flamingo-theme-uiMaven |
14.0 up to 14.4.6 | 14.4.6 |
org.xwiki.platform:xwiki-platform-flamingo-theme-uiMaven |
14.5 up to 14.9-rc-1 | 14.9-rc-1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-26477 is a critical vulnerability (CVSS 10.0) in Xwiki, published March 2, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 74.8%, the 99th percentile. Fixed in org.xwiki.platform:xwiki-platform-flamingo-theme-ui 13.10.10.
References
github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg
jira.xwiki.org/browse/XWIKI-19757
nvd.nist.gov/vuln/detail/CVE-2023-26477