CVE Intelligence

Nextcloud Mail vulnerabilities

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Published CVEs affecting Nextcloud Mail: 1 record(s), with affected versions and fixes.
cpe:2.3:a:nextcloud:mail

CVE-2025-66514 Medium · 5.4 CWE-79 Dec 5, 2025
Nextcloud Mail stored HTML injection in subject text
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.