XWiki Commons are technical libraries common to several other top level XWiki projects. 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`. The problem has been patched on XWiki 13.10.10, 14.4.4 and 14.8RC1.

Affected: Maven: org.xwiki.platform:xwiki-platform-oldcore

### 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: https://github.com/xwiki/xwiki-platform/commit/e4f7f68e93cb08c25632c126356d218abf192d1e#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: https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-jp55-vvmf-63mv

### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira](https://jira.xwiki.org) * Email us at [Security ML](mailto:security@xwiki.org)