{"action":"Upgrade mautic/core to 3.3.4 or later.","affected":[{"fixed":"3.3.4","introduced":"0"},{"fixed":"4.0.0","introduced":"4.0.0-alpha1"}],"component":"mautic/core","cve_ids":["CVE-2021-27910"],"ecosystem":"Packagist","epss":0.00699,"exploited":false,"fixed_versions":["3.3.4","4.0.0"],"ghsa_id":"GHSA-86pv-95mj-7w5f","id":"tcs_01M5KEYQXCEQ74DPVJRHDFXCAF","modified_at":"2026-07-08T06:30:02.579981279Z","published_at":"2021-09-01T18:40:48Z","references":["https://osv.dev/vulnerability/GHSA-86pv-95mj-7w5f","https://github.com/mautic/mautic/security/advisories/GHSA-86pv-95mj-7w5f","https://nvd.nist.gov/vuln/detail/CVE-2021-27910","https://github.com/mautic/mautic/commit/e6a405975342f3cf86aa71927618d31d25135fa3","https://github.com/FriendsOfPHP/security-advisories/blob/master/mautic/core/CVE-2021-27910.yaml","https://github.com/mautic/mautic"],"severity":{"label":"high","score":8.2},"sources":[{"source":"osv","source_id":"GHSA-86pv-95mj-7w5f","url":"https://osv.dev/vulnerability/GHSA-86pv-95mj-7w5f"}],"summary":"Stored XSS vulnerability on Bounce Management Callback"}