{"id":"CVE-2020-35124","aliases":["GHSA-39wj-j3jc-858m"],"url":"https://o3.security/vulnerability/CVE-2020-35124","summary":"XSS vulnerability leveraged through referrers could allow un-authorized admin access in Mautic","details":"### Impact\nThis is a cross-site scripting vulnerability which affects every version of Mautic and could allow an attacker unauthorised administrator level access to Mautic.\n\nThis vulnerability was reported by Naveen Sunkavally at Horizon3.ai.\n\n### Patches\nUpgrade to 3.2.4 or 2.16.5.\n\nLink to patch for 2.x versions: https://github.com/mautic/mautic/compare/2.16.4...2.16.5.diff\n\nLink to patch for 3.x versions: https://github.com/mautic/mautic/compare/3.2.2...3.2.4.diff\n\n### Workarounds\nNone\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Post in https://forum.mautic.org/c/support\n* Email us at security@mautic.org","published":"2021-01-28T06:15:13.373Z","modified":"2026-08-07T15:12:33.892825Z","cvss":{"score":9.6,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Packagist","name":"mautic/core","fixedVersion":"3.2.4"},{"ecosystem":"Packagist","name":"mautic/core","fixedVersion":"2.16.5"}],"fix":{"url":"https://github.com/mautic/mautic/commit/20c5dc39b62164f6922ce53ea42cbb4ccec64e57","label":"mautic/mautic@20c5dc3"},"references":[{"type":"ADVISORY","url":"https://forum.mautic.org/c/announcements/16"},{"type":"ADVISORY","url":"https://github.com/mautic/mautic/security/advisories/GHSA-39wj-j3jc-858m"},{"type":"ADVISORY","url":"https://www.horizon3.ai/disclosures/mautic-unauth-xss-to-rce"},{"type":"ADVISORY","url":"https://www.mautic.org/blog/community/security-release-all-versions-mautic-prior-2-16-5-and-3-2-4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-35124"},{"type":"WEB","url":"https://github.com/mautic/mautic/commit/20c5dc39b62164f6922ce53ea42cbb4ccec64e57"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/mautic/core/CVE-2020-35124.yaml"},{"type":"WEB","url":"https://packagist.org/packages/mautic/core"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:12:33.892825Z"}}