{"id":"CVE-2026-121434","title":"Froxlor 2.3.0 before 2.3.15 Authorization Bypass via Certificates.update API","summary":"Froxlor 2.3.0 before 2.3.15 contains a missing authorization check in the Certificates.add and Certificates.update API commands, which do not verify whether a domain's certificate is Let's Encrypt-managed. Customers with API access can o…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","cvssSource":"cna","cwe":["CWE-862"],"vendor":"froxlor","product":"froxlor","affected":["froxlor >= 2.3.0 < 2.3.15"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-07T03:00:51.440833Z"},"exploitAvailable":true,"published":"2026-11-03","updated":"2026-11-07","sourceUpdated":"2026-11-07T03:01:12.853Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121434","references":[{"url":"https://github.com/froxlor/froxlor/security/advisories/GHSA-ch7m-649m-x7xg","label":"GitHub Security Advisory (GHSA-ch7m-649m-x7xg)"},{"url":"https://www.vulncheck.com/advisories/froxlor-2.3.0-before-2.3.15-authorization-bypass-via-certificates-update-api","label":"VulnCheck Advisory: Froxlor 2.3.0 before 2.3.15 Authorization Bypass via Certificates.update API"}],"tags":["cve.org","exploit-available"],"epss":0.00156,"epssPercentile":0.04791,"ingestedAt":"2026-11-05T19:30:42.969Z","slug":"CVE-2026-121434","body":"## Overview\n\nFroxlor 2.3.0 before 2.3.15 contains a missing authorization check in the Certificates.add and Certificates.update API commands, which do not verify whether a domain's certificate is Let's Encrypt-managed. Customers with API access can overwrite the managed certificate and private key with an attacker-chosen pair, which a REBUILD_VHOST task deploys to the webserver, breaking HTTPS and desynchronizing ACME automation.\n\n## Affected\n\n- `froxlor >= 2.3.0 < 2.3.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":235726,"id":"CVE-2026-121434","ts":1794020953223,"field":"exploit_available","old":"false","new":"true"}]}