low3.8
CVE-2026-91831
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 …
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Subscribe To Comments WordPress Plugin | before 2.3.3 |
Versions were read from the advisory text. No structured product data has been published for this record yet.