CVE-2026-91831
LOW
CVSS 3.8
Published: 2026-10-19
Modified: 2026-10-19
Tenable Plugin
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Threat Intelligence Pending
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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.
Quick Facts
| CVE ID | CVE-2026-91831 |
| CVSS Score | 3.8 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N |
| Published | 2026-10-19 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |