CVE-2026-91830: Unknown Subscribe To Comments

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

The Subscribe to Comments WordPress plugin before 2.3.3 does not sign or validate a cookie it trusts to identify a commenter, allowing unauthenticated attackers to disclose a subscriber's management key and silently alter that subscriber's subscriptions.

Affected products

• Unknown Subscribe To Comments: before 2.3.3 (fixed in 2.3.3)

Published 2026-10-16. Last modified 2026-10-16.