PayTR Virtual Pos iFrame API WHMCS Module: Use of Less Trusted Source
CVE-2026-16272 is a critical-severity use of less trusted source vulnerability in PayTR Virtual Pos iFrame API WHMCS Module from PayTR Payment and Electronic Money Institution, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version v9.0.3 as the first without the flaw, so updating PayTR Virtual Pos iFrame API WHMCS Module to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.21% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update PayTR Virtual Pos iFrame API WHMCS Module to v9.0.3 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| PayTR Payment and Electronic Money Institution | PayTR Virtual Pos iFrame API WHMCS Module | v9.0.0 up to, but not including, v9.0.3 | v9.0.3 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CNA (usom.gov.tr).
Official description
Use of less trusted source vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API WHMCS Module allows Exploitation of Trusted Identifiers. This issue affects PayTR Virtual Pos iFrame API WHMCS Module: from v9.0.0 before v9.0.3.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Less Trusted Source
The product has two different sources of the same data or information, but it uses the source that has less support for verification, is less trusted, or is less resistant to attack.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in PayTR Virtual Pos iFrame API WHMCS Module
- 7.5 High severity
- 7.5 High severity
Recent Use of Less Trusted Source vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 9.1 Critical severity
- 9.0 Critical severity
- 10.0 Critical severity
- 7.5 High severity
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