CVE-2026-91831lowCWE-93

CVE-2026-91831: low-severity vulnerability in Subscribe to Comments

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

Published

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E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

28Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 3.8epss 0.2%
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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Affected products
Unknown · Subscribe to Comments
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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