Impact

It is possible to bypass the existing security measures put in place to avoid open redirect by using a redirect such as //mydomain.com (i.e. omitting the http:). It was also possible to bypass it when using URL such as http:/mydomain.com.

Patches

The problem has been patched on XWiki 13.10.10, 14.4.4 and 14.8RC1.

Workarounds

The only way to workaround the bug is by providing a patched jar of xwiki-platform-oldcore containing the following changes: xwiki/xwiki-platform@e4f7f68#diff-c445f288d5d63424f56ef13f65514ab4e174a72e979b53b88197c2b7def267cf.

References

• Jira ticket of the reported vulnerability: https://jira.xwiki.org/browse/XWIKI-19994
• Jira ticket of the original mechanism put in place to prevent open redirect: https://jira.xwiki.org/browse/XWIKI-10309
• Original advisory about open redirect: GHSA-jp55-vvmf-63mv

For more information

If you have any questions or comments about this advisory:

• Open an issue in Jira
• Email us at Security ML

References

• GHSA-jp55-vvmf-63mv
• GHSA-xwph-x6xj-wggv
• xwiki/xwiki-platform@e4f7f68#diff-c445f288d5d63424f56ef13f65514ab4e174a72e979b53b88197c2b7def267cf
• https://jira.xwiki.org/browse/XWIKI-10309
• https://jira.xwiki.org/browse/XWIKI-19994
• https://nvd.nist.gov/vuln/detail/CVE-2023-29204