{"id":"CVE-2008-4930","aliases":["EUVD-2008-4909","GHSA-m5jh-9fcq-22hm"],"status":"published","title":"MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard...","description":"MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard file type that contains HTML sequences, which allows remote attackers to cause that file to be processed as HTML by Internet Explorer's content inspection, aka \"Incomplete protection against MIME-sniffing.\" NOTE: this could be leveraged for XSS and other attacks.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01153,"percentile":0.67174,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2008-11-04T20:00:00Z","modified":"2026-06-16T22:58:47Z","products":[{"vendor":"mybb","product":"mybb"}],"references":[{"url":"http://archives.neohapsis.com/archives/bugtraq/2008-10/0203.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://archives.neohapsis.com/archives/fulldisclosure/2008-10/0472.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2008/11/01/2","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2008-4930"},{"url":"https://github.com/advisories/GHSA-m5jh-9fcq-22hm"}],"sources":{"cve":[{"id":"CVE-2008-4930","description":"MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard file type that contains HTML sequences, which allows remote attackers to cause that file to be processed as HTML by Internet Explorer's content inspection, aka \"Incomplete protection against MIME-sniffing.\" NOTE: this could be leveraged for XSS and other attacks.","status":"published","published":"2008-11-04T20:00:00Z","modified":"2024-09-16T23:10:27.783Z","updated_at":"2026-11-02T14:34:46.950176Z"}],"euvd":[{"id":"EUVD-2008-4909","description":"MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard file type that contains HTML sequences, which allows remote attackers to cause that file to be processed as HTML by Internet Explorer's content inspection, aka \"Incomplete protection against MIME-sniffing.\" NOTE: this could be leveraged for XSS and other attacks.","status":"published","published":"2008-11-04T20:00:00Z","modified":"2024-09-16T23:10:27Z","updated_at":"2026-11-03T00:54:56.209754Z"}],"ghsa":[{"id":"GHSA-m5jh-9fcq-22hm","title":"MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard...","description":"MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard file type that contains HTML sequences, which allows remote attackers to cause that file to be processed as HTML by Internet Explorer's content inspection, aka \"Incomplete protection against MIME-sniffing.\" NOTE: this could be leveraged for XSS and other attacks.","status":"published","published":"2022-05-17T05:53:39Z","modified":"2023-01-28T05:05:11Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:44:18.5771Z"}],"nvd":[{"id":"CVE-2008-4930","description":"MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard file type that contains HTML sequences, which allows remote attackers to cause that file to be processed as HTML by Internet Explorer's content inspection, aka \"Incomplete protection against MIME-sniffing.\" NOTE: this could be leveraged for XSS and other attacks.","status":"published","published":"2008-11-04T21:00:05.987Z","modified":"2026-06-16T22:58:47.213Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:01:29.702694Z"}]}}