GMS-2022-6859: Stored XSS using HTMLEditor

November 21, 2022

A malicious content author could add a JavaScript payload to the href attribute of a link by splitting a javascript URL with white space characters.

An attacker must have access to the CMS to exploit this issue.

References

github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2022-37429.yaml
github.com/advisories/GHSA-wc6r-4ggc-79w5
www.silverstripe.org/download/security-releases/cve-2022-37429

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