nextcloud mail vulnerabilities (CVE)

CVE records published for nextcloud mail, newest first. Follow to get an email when a new one appears.

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3.5Low
CVE-2025-66514

Nextcloud Mail stored HTML injection in subject text

nextcloud security-advisories

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…