WHMCS CVE-2026-16272
WHMCS is affected by CVE-2026-16272. Use of less trusted source vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API (v9x) WHMCS Module allows Exploitation of Trusted Identifiers. This issue affects PayTR Virtual Pos iFrame API (v9x) WHMCS Module: from v9.0.0 before v9.0.3. CVSS base score: 9.1.
What this means under a SharedLicense license
Your SharedLicense license itself is not affected — this is a vulnerability in WHMCS software, 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 WHMCS under your own brand, patch client servers too — unpatched installs put your reputation at risk, not your license.
Use of less trusted source vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API (v9x) WHMCS Module allows Exploitation of Trusted Identifiers.
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-2026-16272
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