Impact
Any user with edit rights on a page (e.g., it's own user page), can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the section ids in XWiki.AdminFieldsDisplaySheet. This page is installed by default.
Reproduction steps are described in https://jira.xwiki.org/browse/XWIKI-20261
Patches
The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11.
Workarounds
The issue can be fixed by applying this patch on XWiki.AdminFieldsDisplaySheet.
References
For more information
If you have any questions or comments about this advisory:
Impact
Any user with edit rights on a page (e.g., it's own user page), can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the section ids in
XWiki.AdminFieldsDisplaySheet. This page is installed by default.Reproduction steps are described in https://jira.xwiki.org/browse/XWIKI-20261
Patches
The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11.
Workarounds
The issue can be fixed by applying this patch on
XWiki.AdminFieldsDisplaySheet.References
For more information
If you have any questions or comments about this advisory: