Detections
Analytics
CVE-2025-66514
low
Description
Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Prior to 5.5.3, a stored HTML injection in the Mail app's message list allowed an authenticated user to inject HTML into the email subjects. Javascript was correctly blocked by the content security policy of the Nextcloud Server code.
References
https://hackerone.com/reports/3357036
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v394-8gpc-6fv5
https://github.com/nextcloud/mail/pull/11740
https://github.com/nextcloud/mail/commit/c64fcc3b79e0c089b5e1d2e04a07bfa740b2ac09