CVE-2026-13143: Unknown Wp Travel

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The WP Travel WordPress plugin before 11.8.1 does not verify PayPal Instant Payment Notifications through the PayPal post-back handshake before marking a booking paid, allowing unauthenticated attackers to forge a notification that flips an arbitrary pending booking to a paid and booked state at an attacker-chosen amount.

Affected products

• Unknown Wp Travel: before 11.8.1 (fixed in 11.8.1)

Published 2026-07-30. Last modified 2026-07-30.