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CVE-2026-91831

LOW 3.8 CVSS 3.1
Published
October 19, 2026
Last modified
October 19, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-93
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

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.

Affected WordPress components

  • Subscribe to Comments Plugin · subscribe-to-comments
    Confirmed match Active
    From 2.3 (including) to 2.3.3 (excluding)
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown Subscribe to Comments — From 2.3 (including) to 2.3.3 (excluding)

References

  • wpscan.com https://wpscan.com/vulnerability/6cd60f78-f5e2-4b4a-8d50-7d2bc4f981ee/
  • nvd.nist.gov Official NVD record