Vulnerability in Paytr Payment And Electronic Money Institution Inc. Virtual Pos Iframe API (V9x) Whmcs Module

CVE-2026-16037

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16037: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16037?
CVE-2026-16037 is a high-severity vulnerability in Paytr Payment And Electronic Money Institution Inc. Virtual Pos Iframe API (V9x) Whmcs Module, classified under CWE-208. CVSS score: 7.5/10. Published 2026-09-08.
How severe is CVE-2026-16037?
High severity. CVSS v3 base score is 7.5 out of 10.