{"schema_version":1,"title":"WHMCS vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 3 vulnerabilities in WHMCS: 0 in the last 7 days and 2 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-67399, was published on 14 September 2026. 1 technology has a page of its own.","url":"https://junglewise.ai/threats/vendors/whmcs","json_url":"https://junglewise.ai/threats/vendors/whmcs.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/vendors/whmcs","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"vendor","counts":{"high":0,"all_time":3,"critical":1,"exploited":0,"last_7_days":0,"last_30_days":2,"last_90_days":2,"last_365_days":3},"latest":[{"cve":"CVE-2026-67399","cvss":9.8,"epss":0.0075,"slug":"cve-2026-67399-whmcs-deserialization-of-untrusted-data-remote-code-execution","title":"WHMCS deserialization of untrusted data remote code execution","severity":"info","exploited":false,"published_at":"2026-09-14T21:17:25.423+00:00","url":"https://junglewise.ai/threats/cve-2026-67399-whmcs-deserialization-of-untrusted-data-remote-code-execution"},{"cve":"CVE-2026-67398","epss":0.0048,"slug":"cve-2026-67398-whmcs-2checkout-payment-gateway-authorization-bypass","title":"WHMCS 2Checkout payment gateway authorization bypass","severity":"info","exploited":false,"published_at":"2026-09-04T00:17:13.563+00:00","url":"https://junglewise.ai/threats/cve-2026-67398-whmcs-2checkout-payment-gateway-authorization-bypass"},{"cve":"CVE-2026-29204","cvss":9.1,"slug":"cve-2026-29204-whmcs-authorization-bypass-in-clientarea-php-via-addonid","title":"WHMCS authorization bypass in clientarea.php via addonId","severity":"critical","exploited":false,"published_at":"2026-05-12T18:16:51.03+00:00","url":"https://junglewise.ai/threats/cve-2026-29204-whmcs-authorization-bypass-in-clientarea-php-via-addonid"}],"vendor":{"hub":true,"name":"WHMCS","slug":"whmcs","homepage":"https://www.whmcs.com/","description":"A software company providing automation and billing solutions for the web hosting industry.","url":"https://junglewise.ai/threats/vendors/whmcs"},"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"most_severe":[{"cve":"CVE-2026-29204","cvss":9.1,"slug":"cve-2026-29204-whmcs-authorization-bypass-in-clientarea-php-via-addonid","title":"WHMCS authorization bypass in clientarea.php via addonId","severity":"critical","exploited":false,"published_at":"2026-05-12T18:16:51.03+00:00","url":"https://junglewise.ai/threats/cve-2026-29204-whmcs-authorization-bypass-in-clientarea-php-via-addonid"},{"cve":"CVE-2026-67399","cvss":9.8,"epss":0.0075,"slug":"cve-2026-67399-whmcs-deserialization-of-untrusted-data-remote-code-execution","title":"WHMCS deserialization of untrusted data remote code execution","severity":"info","exploited":false,"published_at":"2026-09-14T21:17:25.423+00:00","url":"https://junglewise.ai/threats/cve-2026-67399-whmcs-deserialization-of-untrusted-data-remote-code-execution"},{"cve":"CVE-2026-67398","epss":0.0048,"slug":"cve-2026-67398-whmcs-2checkout-payment-gateway-authorization-bypass","title":"WHMCS 2Checkout payment gateway authorization bypass","severity":"info","exploited":false,"published_at":"2026-09-04T00:17:13.563+00:00","url":"https://junglewise.ai/threats/cve-2026-67398-whmcs-2checkout-payment-gateway-authorization-bypass"}],"generated_at":"2026-09-26T09:11:00.170868+00:00","technologies":[{"name":"WHMCS","slug":"whmcs","vulnerabilities":3,"url":"https://junglewise.ai/threats/technologies/whmcs"}]}