CVE-2026-16037: Paytr Payment And Electronic Money Institution Inc Paytr Virtual Pos Iframe API Whmcs Module

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API WHMCS Module allows Black Box Reverse Engineering. This issue affects PayTR Virtual Pos iFrame API WHMCS Module: from v9.0.0 before v9.0.3.

Affected products

• Paytr Payment And Electronic Money Institution Inc Paytr Virtual Pos Iframe API Whmcs Module: from v9.0.0, before v9.0.3 (fixed in v9.0.3)

Published 2026-09-08. Last modified 2026-10-01.