CVE-2026-91831
Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting
CVSS Score
3.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | unknown |
| Product | subscribe to comments |
| Published | Oct 19, 2026 |
Stay Ahead of the Next One
Get instant alerts for unknown subscribe to comments
Be the first to know when new low vulnerabilities affecting unknown subscribe to comments are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Unknown / Subscribe to Comments
2.3 < 2.3.3
References
Credits
Het Kalariya WPScan