{"id":"CVE-2021-27912","aliases":["GHSA-rh5w-82wh-jhr8"],"url":"https://o3.security/vulnerability/CVE-2021-27912","summary":"XSS vulnerability on asset view","details":"### Impact\nMautic versions before 3.3.4 / 4.0.0 are vulnerable to an inline JS XSS attack when viewing Mautic assets by utilizing inline JS in the title and adding a broken image URL as a remote asset. This can only be leveraged by an authenticated user with permission to create or edit assets. \n\n### Patches\nUpgrade to 3.3.4 or 4.0.0\n\n### Workarounds\nNo\n\n### References\nhttps://github.com/mautic/mautic/releases/tag/3.3.4\nhttps://github.com/mautic/mautic/releases/tag/4.0.0\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [security@mautic.org](mailto:security@mautic.org)\n","published":"2021-08-30T16:15:07.403Z","modified":"2026-08-07T15:15:26.623292Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00604,"percentile":0.4738,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"mautic/core","fixedVersion":"3.3.4"},{"ecosystem":"Packagist","name":"mautic/core","fixedVersion":"4.0.0"}],"fix":null,"references":[{"type":"FIX","url":"https://github.com/mautic/mautic/security/advisories/GHSA-rh5w-82wh-jhr8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27912"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/mautic/core/CVE-2021-27912.yaml"},{"type":"PACKAGE","url":"https://github.com/mautic/mautic"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:15:26.623292Z"}}