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.
History

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions subscribe To Comments
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

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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
Metrics cvssV3_1

{'score': 3.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N'}


cve-icon MITRE

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

cve-icon Vulnrichment

Updated: 2026-10-19T09:25:19.879Z

cve-icon NVD

Status : Deferred

Published: 2026-10-19T07:16:32.187

Modified: 2026-10-19T21:02:51.987

Link: CVE-2026-91831

cve-icon Redhat

No data.