WordPress Plugin Vulnerabilities
Quick Event Manager 9.9.5 - 9.18 - Unauthenticated PayPal IPN Verification Bypass via the 'debug' Parameter
Description
The plugin does not verify the authenticity of PayPal payment notifications before marking event registrations as paid, which could allow unauthenticated attackers to mark registrations as paid without making a payment.
Proof of Concept
Affects Plugins
Fixed in 9.19 References
CVE
Miscellaneous
Original Researcher
Naoki Kawahigashi
Submitter
Naoki Kawahigashi
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2026-11-04 (about 2 days ago)
Added
2026-11-04 (about 1 day ago)
Last Updated
2026-11-04 (about 1 day ago)
