CVE-2026-13176: Unknown Eventin

Low severity, CVSS 2.7. EPSS: 0.3% chance of exploitation in the next 30 days.

The Eventin WordPress plugin before 4.1.21 does not validate a user-supplied webhook URL stored on events nor verify event ownership, allowing users with contributor-level access and above to trigger blind server-side requests to arbitrary hosts.

Affected products

• Unknown Eventin: before 4.1.21 (fixed in 4.1.21)

Published 2026-08-21. Last modified 2026-08-26.