{"id":"CVE-2026-16037","aliases":["EUVD-2026-72853","GHSA-v26j-p538-j93h"],"status":"published","title":"Callback Authentication Bypass via Timing Attack in PayTR's PayTR Virtual Pos iFrame API WHMCS Module","description":"Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API WHMCS Module allows Black Box Reverse Engineering.\n\nThis issue affects PayTR Virtual Pos iFrame API WHMCS Module: from v9.0.0 before v9.0.3.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00416,"percentile":0.3619,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-208"],"published":"2026-09-08T15:12:44Z","modified":"2026-10-01T13:17:09Z","products":[{"vendor":"paytr payment and electronic money institution inc.","product":"paytr virtual pos iframe api whmcs module"}],"references":[{"url":"https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1034","tags":["government-resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16037"},{"url":"https://github.com/advisories/GHSA-v26j-p538-j93h"}],"sources":{"cve":[{"id":"CVE-2026-16037","title":"Callback Authentication Bypass via Timing Attack in PayTR's PayTR Virtual Pos iFrame API WHMCS Module","description":"Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API WHMCS Module allows Black Box Reverse Engineering.\n\nThis issue affects PayTR Virtual Pos iFrame API WHMCS Module: from v9.0.0 before v9.0.3.","status":"published","published":"2026-09-08T15:12:44.262Z","modified":"2026-10-01T12:41:42.055Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:20:10.870108Z"}],"euvd":[{"id":"EUVD-2026-72853","description":"Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API WHMCS Module allows Black Box Reverse Engineering.\n\nThis issue affects PayTR Virtual Pos iFrame API WHMCS Module: from v9.0.0 before v9.0.3.","status":"published","published":"2026-09-08T15:12:44Z","modified":"2026-10-01T12:41:42Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T17:27:46.486382Z"}],"ghsa":[{"id":"GHSA-v26j-p538-j93h","title":"Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc...","description":"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.\n\nThis issue affects PayTR Virtual Pos iFrame API (v9x) WHMCS Module: from v9.0.0 before v9.0.3.","status":"published","published":"2026-09-08T18:31:48Z","modified":"2026-09-08T18:31:49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T15:11:28.397774Z"}],"nvd":[{"id":"CVE-2026-16037","description":"Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API WHMCS Module allows Black Box Reverse Engineering.\n\nThis issue affects PayTR Virtual Pos iFrame API WHMCS Module: from v9.0.0 before v9.0.3.","status":"published","published":"2026-09-08T16:18:01.997Z","modified":"2026-10-01T13:17:09.337Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:12:44.436435Z"}]}}