medium · CVSS v3 3.8 · EPSS 0.00161

CVE-2026-91831

The Subscribe to Comments WordPress plugin before 2.3.3 does not sanitise newline characters from a notification sender-…

Description

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 sender.

Scores

Severity
medium
CVSS v2
4.7
CVSS v3
3.8
CVSS v4
—
EPSS
0.00161

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