CVE-2026-16037
Callback Authentication Bypass via Timing Attack in PayTR's PayTR Virtual Pos iFrame API (v9x) WHMCS Module
Description
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.
INFO
Published Date :
Sept. 8, 2026, 3:12 p.m.
Last Modified :
Sept. 8, 2026, 3:12 p.m.
Remotely Exploit :
Yes !
Source :
TR-CERT
Affected Products
The following products are affected by CVE-2026-16037
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | ca940d4e-fea4-4aa2-9a58-591a58b1ce21 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update the WHMCS module to version 9.0.3 or later.
- Apply any available vendor patches for the module.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-16037 vulnerability anywhere in the article.