{"id":"CVE-2021-27520","aliases":["EUVD-2021-14272","GHSA-33xj-4jh4-g344"],"status":"published","title":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript...","description":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript via index.php in the \"author\" parameter.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.06396,"percentile":0.93718,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-79"],"published":"2021-03-19T18:53:54Z","modified":"2026-10-20T10:53:40Z","exploits":[{"source":"exploitdb","id":"EDB-49943","title":"FUDForum 3.1.0 - 'author' Reflected XSS","type":"webapps","platform":"php","date":"2021-06-03","url":"https://www.exploit-db.com/exploits/49943"},{"source":"nuclei","id":"CVE-2021-27520","title":"FUDForum 3.1.0 - Cross-Site Scripting","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27520.yaml"}],"products":[{"vendor":"fudforum","product":"fudforum"}],"references":[{"url":"https://github.com/fudforum/FUDforum/issues/2","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"http://packetstormsecurity.com/files/162942/FUDForum-3.1.0-Cross-Site-Scripting.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27520"},{"url":"https://github.com/advisories/GHSA-33xj-4jh4-g344"}],"sources":{"cve":[{"id":"CVE-2021-27520","description":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript via index.php in the \"author\" parameter.","status":"published","published":"2021-03-19T18:53:54Z","modified":"2024-08-03T21:26:09.685Z","updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14272","description":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript via index.php in the \"author\" parameter.","status":"published","published":"2021-03-19T18:53:54Z","modified":"2024-08-03T21:26:09Z","updated_at":"2026-11-03T03:24:48.919164Z"}],"ghsa":[{"id":"GHSA-33xj-4jh4-g344","title":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript...","description":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript via index.php in the \"author\" parameter.","status":"published","published":"2022-05-24T17:44:56Z","modified":"2023-01-29T05:06:55Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:07.317218Z"}],"nvd":[{"id":"CVE-2021-27520","description":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript via index.php in the \"author\" parameter.","status":"published","published":"2021-03-19T19:15:13.977Z","modified":"2026-06-17T03:45:01.063Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:50.805771Z"}],"osv":[{"id":"CVE-2021-27520","description":"A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript via index.php in the \"author\" parameter.","status":"published","published":"2021-03-19T19:15:13.977Z","modified":"2026-10-20T10:53:40.93863334Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.129331Z"}]}}