Callback Authentication Bypass via Timing Attack in PayTR's PayTR Virtual Pos iFrame API WHMCS Module
Priority LOW 39CWE-208Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-208.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00416 36th percentileScored 2026-11-07
Fix Fixed PayTR Virtual Pos iFrame API WHMCS Module (PayTR Payment and Electronic Money Institution Inc.): v9.0.3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| PayTR Payment and Electronic Money Institution Inc. | PayTR Virtual Pos iFrame API WHMCS Module | v9.0.0 to before v9.0.3 | v9.0.3 | Patch available | CNA |
- PayTR Virtual Pos iFrame API WHMCS Module VendorPayTR Payment and Electronic Money Institution Inc. Affected v9.0.0 to before v9.0.3 Fixed in v9.0.3 Patch available CNA
Remediation
- Fix · CNA PayTR Virtual Pos iFrame API WHMCS Module (PayTR Payment and Electronic Money Institution Inc.) Fixed in v9.0.3
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
PayTR Virtual Pos iFrame API WHMCS Module v9.0.3
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-13413 Improper Payment Validation in PayTR's PayTR Virtual Pos iFrame API WHMCS ModulePriority LOW 39
Timeline
- 2026-10-02 Threatist record created from CVE-2026-16037
- 2026-10-03 Alias added: GHSA-v26j-p538-j93h
References
More PayTR Payment and Electronic Money Institution Inc. vulnerabilities
- TI-2026-13606 Client IP Spoofing via Untrusted HTTP Headers in PayTR's PayTR Virtual Pos iFrame API WHMCS Module CVSS 3.1CRITICAL 9.1
- TI-2026-13413 Improper Payment Validation in PayTR's PayTR Virtual Pos iFrame API WHMCS Module CVSS 3.1HIGH 7.5
Sources
- CVE-2026-16037 · CVE Program
- CVE-2026-16037 · NVD
- FIRST EPSS
- GHSA-v26j-p538-j93h · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences