CVE-2026-91831CWE-93

CVE-2026-91831

Low · published October 19, 2026

CVSS v3.1
3.8
EPSS
0%
Percentile
4.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.8 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00161 · 4.9th percentile
Weakness
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-10-19T11:16Z
References (1)
https://wpscan.com/vulnerability/6cd60f78-f5e2-4b4a-8d50-7d2bc4f981ee/ · [email protected]
EPSS history
Timeline
  • 20 OCT 03:34Z
    EPSS moved — → 0%
    epss
  • 19 OCT 06:46Z
    Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting
    cvelistv5
  • 19 OCT 06:46Z
    Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting
    cvelistv5