CVE-2026-16037highCWE-208

CVE-2026-16037: high-severity vulnerability in PayTR Virtual Pos iFrame API WHMCS Module

Callback Authentication Bypass via Timing Attack in PayTR's PayTR Virtual Pos iFrame API WHMCS Module

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
PayTR Payment and Electronic Money Institution Inc. · PayTR Virtual Pos iFrame API WHMCS Module
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CVE-2026-16025HIGHImproper Payment Validation in PayTR's PayTR Virtual Pos iFrame API WHMCS ModuleEPSS 0.5%CVE-2026-16272CRITICALClient IP Spoofing via Untrusted HTTP Headers in PayTR's PayTR Virtual Pos iFrame API WHMCS ModuleEPSS 0.2%