cvedb.io
CVE-2025-66514
LOW · CVSS 3.5
EPSS exploitation probability: 0%
Published 2025-12-05T18:15:57.457 · Last modified 2026-06-17T09:56:58.010

Summary

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.

Affected products

nextcloud — mail

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.