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PayTR Module for WHMCS CVE-2026-16037: Observable Timing Discrepancy

PayTR Virtual POS iFrame module for WHMCS is affected by CVE-2026-16037. 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. Affected versions: v9.0.0 before v9.0.3. Fixed in v9.0.3. CVSS base score: 7.5.

High 7.5 CVSS
WHMCS AlmaLinux 8 AlmaLinux 9 Debian 11 Debian 12 Ubuntu 20.04 Ubuntu 22.04

Затронутые версии

v9.0.0 before v9.0.3

Исправленная версия

v9.0.3

Команда обновления по умолчанию

# Replace the PayTR module files with v9.0.3 from the vendor

Команды исправления

All supported operating systems

# Replace the PayTR Virtual POS iFrame module with v9.0.3 from the vendor
# WHMCS → Setup → Payment Gateways → confirm the module version

Что это значит по лицензии SharedLicense

Your SharedLicense WHMCS license itself is not affected — this is a vulnerability in PayTR Virtual POS iFrame module for WHMCS, not in licensing. Licenses continue to work during and after the update; there is no need to re-issue or re-activate anything. If you resell under your own brand, patch client servers too — unpatched installs put your reputation at risk, not your license.

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.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-16037

Часто задаваемые вопросы

What is CVE-2026-16037?
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. Affected versions: v9.0.0 before v9.0.3. Fixed in v9.0.3.
Is CVE-2026-16037 being exploited in the wild?
No confirmed public exploitation has been announced at the time of writing. With a CVSS base score of 7.5, apply the update on your next maintenance window and watch the vendor advisory for changes.
How do I fix CVE-2026-16037?
Replace the PayTR Virtual POS iFrame module with v9.0.3 from the vendor. WHMCS → Setup → Payment Gateways → confirm the module version.
Which versions are affected?
Affected: v9.0.0 before v9.0.3. Update to v9.0.3 or later.

Источники

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