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.
Metrics
Affected Vendors & Products
References
History
Wed, 21 Oct 2026 17:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Wordpress-extensions
Wordpress-extensions subscribe To Comments |
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| Vendors & Products |
Wordpress-extensions
Wordpress-extensions subscribe To Comments |
Mon, 19 Oct 2026 12:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-113 CWE-20 |
Mon, 19 Oct 2026 10:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-93 | |
| Metrics |
ssvc
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Mon, 19 Oct 2026 08:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-113 CWE-20 |
Mon, 19 Oct 2026 07:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: WPScan
Published: 2026-10-19T06:46:17.280Z
Updated: 2026-10-19T09:31:21.214Z
Reserved: 2026-09-15T08:14:21.129Z
Link: CVE-2026-91831
Updated: 2026-10-19T09:25:19.879Z
Status : Deferred
Published: 2026-10-19T07:16:32.187
Modified: 2026-10-19T21:02:51.987
Link: CVE-2026-91831
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