01 Record
CVE-2026-16272
Client IP Spoofing via Untrusted HTTP Headers in PayTR's PayTR Virtual Pos iFrame API WHMCS Module
CriticalPUBLISHEDCNA: TR-CERT
CNA base score9.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
02 Description
Client IP Spoofing via Untrusted HTTP Headers in PayTR's PayTR Virtual Pos iFrame API WHMCS Module
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.21% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 11.2% of scored records. A rank, not a probability.
- NVD base score
- 9.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-01.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-09-09 08:17Z1 MO AGO
- Last updated
- 2026-10-01 12:42Z28 DAYS AGO
- Reserved
- 2026-07-20
- Assigning CNA
- TR-CERT
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.1)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-348Use of Less Trusted SourceBase
- Data version
- 5.2
- Document digest
- f337e9b01419238dffd63342fff3b7d6277b20534fd14280014caa87fec796b6
05 Affected products
VendorProductVersionsPlatforms
PayTR Payment and Electronic Money Institution Inc.PayTR Virtual Pos iFrame API WHMCS Modulev9.0.0 to < v9.0.3—
06 References
- siberguvenlik.gov.trhttps://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1034