Vulnerability-Lookup

CVE-2026-16037 (GCVE-0-2026-16037)

Vulnerability from cvelistv5 – Published: 2026-09-08 15:12 – Updated: 2026-09-08 15:48

Title

Callback Authentication Bypass via Timing Attack in PayTR's PayTR Virtual Pos iFrame API (v9x) WHMCS Module

Summary

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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 15:47 UTC

CWE

CWE-208 - Observable timing discrepancy

Assigner

TR-CERT mitre root

References

1 reference

URL	Tags
https://siberguvenlik.gov.tr/guvenlik-bildirimler…	government-resource

Impacted products

1 product

Vendor	Product	Version	CPE status
PayTR Payment and Electronic Money Institution Inc.	PayTR Virtual Pos iFrame API (v9x) WHMCS Module	Affected: v9.0.0 , < v9.0.3 (custom)	guessed

Date Public

2026-09-08 15:07

Credits

Efe KIRBAŞ

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-16037

Vulnerability from fkie_nvd - Published: 2026-09-08 16:18 - Updated: 2026-09-08 18:34

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	iletisim@usom.gov.tr	https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1034

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "PayTR Virtual Pos iFrame API (v9x) WHMCS Module",
          "vendor": "PayTR Payment and Electronic Money Institution Inc.",
          "versions": [
            {
              "lessThan": "v9.0.3",
              "status": "affected",
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GHSA-V26J-P538-J93H

Vulnerability from github – Published: 2026-09-08 18:31 – Updated: 2026-09-08 18:31

Details

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.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-16037"
  ],
  "database_specific": {
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      "CWE-208"
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    "github_reviewed_at": null,
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  },
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  "id": "GHSA-v26j-p538-j93h",
  "modified": "2026-09-08T18:31:48Z",
  "published": "2026-09-08T18:31:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16037"
    },
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    }
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    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-16037 (GCVE-0-2026-16037)

FKIE_CVE-2026-16037

GHSA-V26J-P538-J93H

Tags

Sightings

Nomenclature