GMS-2022-6860: Stored XSS in Compare Mode

November 22, 2022

A malicious content author could add a Javascript payload to a page’s meta description and get it executed in the versioned history compare view.

This vulnerability requires access to the CMS to be deployed. The attacker must then convince a privileged user to access the version history for that page.

References

github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/versioned-admin/CVE-2022-38145.yaml
github.com/advisories/GHSA-66jf-xm2m-7m8r
www.silverstripe.org/download/security-releases/cve-2022-38145

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