Headline
CVE-2023-29513: Users can be created even when registration is disabled without validation via the template macro
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. If guest has view right on any document. It’s possible to create a new user using the distribution/firstadminuser.wiki in the wrong context. This vulnerability has been patched in XWiki 15.0-rc-1 and 14.10.1. There is no known workaround other than upgrading.
Impact
If guest has view right on any document. It’s possible to create a new user using the distribution/firstadminuser.wiki in the wrong context.
To reproduce:
- On a wiki with view rights for guests but user registration disabled, open as guest /xwiki/bin/view/Main?sheet=CKEditor.HTMLConverter&language=en&sourceSyntax=xwiki%2F2.1&stripHTMLEnvelope=true&fromHTML=false&toHTML=true&text=%7B%7Btemplate+name%3D%22distribution%2Ffirstadminuser.wiki%22+%2F%7D%7D where is the URL of your XWiki installation.
- Enter username and password of your choice.
- Click “Register and login”
Starting with XWiki 14.5 (or CKEditor contrib extension 1.64.3) you need to include a valid CSRF token.
Patches
The vulnerability has been patched in XWiki 15.0-rc-1 and 14.10.1.
Workarounds
There is no known workaround other than upgrading.
References
https://jira.xwiki.org/browse/XWIKI-19852
https://jira.xwiki.org/browse/XWIKI-20400
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
Related news
### Impact If a guest has view rights on any document, it's possible to create a new user using the `distribution/firstadminuser.wiki` in the wrong context. To reproduce: * On a wiki with view rights for guests but user registration disabled, open as guest <server>/xwiki/bin/view/Main?sheet=CKEditor.HTMLConverter&language=en&sourceSyntax=xwiki%2F2.1&stripHTMLEnvelope=true&fromHTML=false&toHTML=true&text=%7B%7Btemplate+name%3D%22distribution%2Ffirstadminuser.wiki%22+%2F%7D%7D where <server> is the URL of your XWiki installation. * Enter username and password of your choice. * Click "Register and login" ### Patches The vulnerability has been patched in XWiki 15.0-rc-1 and 14.10.1. ### Workarounds There is no known workaround other than upgrading. ### References https://jira.xwiki.org/browse/XWIKI-19852 https://jira.xwiki.org/browse/XWIKI-20400 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki.org](https://jira.xwik...