CVE-2026-16037
HighCVSS 7.5Summary
Observable timing discrepancy vulnerability in PayTR Virtual Pos iFrame API (v9x) WHMCS Module allows Black Box Reverse Engineering. Affects versions from v9.0.0 before v9.0.3.
Risk Assessment
An attacker can exploit timing differences to reverse engineer the system's logic, potentially facilitating further attacks on the payment system.
Recommendation
Upgrade the PayTR Virtual Pos iFrame API (v9x) WHMCS Module to version v9.0.3 or later, which includes the fix.
Other vulnerabilities in PayTR Virtual Pos iFrame API (v9x) WHMCS Module
See all- CVE-2026-16025High
Improper validation of specified quantity in input vulnerability in PayTR Virtual Pos iFrame API (v9x) WHMCS Module allows Input Data Manipulation. Affects versions from v9.0.0 before v9.0.3.
- CVE-2026-16272Critical
Use of less trusted source vulnerability in PayTR Virtual Pos iFrame API (v9x) WHMCS Module allows Exploitation of Trusted Identifiers. This issue affects versions from v9.0.0 before v9.0.3.
Original NVD description (English source)
Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API (v9x) WHMCS Module allows Black Box Reverse Engineering. This issue affects PayTR Virtual Pos iFrame API (v9x) WHMCS Module: from v9.0.0 before v9.0.3.