CVE-2026-91831 Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting

The Subscribe to Comments WordPress plugin before 2.3.3 does not sanitise newline characters from a notification sender-name setting before using it in e-mail headers, allowing users with Author-level access and above to inject arbitrary e-mail headers, such as a hidden Bcc, and to spoof the send...

CVE-2026-91831

The Subscribe to Comments WordPress plugin versions before 2.3.3 is vulnerable to an Email Header Injection flaw. The application fails to sanitize newline characters in the notification sender-name setting before utilizing them in email headers. This allows users with Author-level access or high...