{"id":"CVE-2009-1030","aliases":["EUVD-2009-1031","GHSA-fg2g-28hw-pqvr"],"status":"published","title":"Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu...","description":"Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu-functions.php in WordPress MU (WPMU) before 2.7 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.04664,"percentile":0.91869,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-79"],"published":"2009-03-20T00:00:00Z","modified":"2026-06-16T23:06:21Z","exploits":[{"source":"exploitdb","id":"EDB-8196","title":"WordPress MU \u003c 2.7 - 'HOST' HTTP Header Cross-Site Scripting","type":"webapps","platform":"php","date":"2009-03-10","verified":true,"url":"https://www.exploit-db.com/exploits/8196"}],"products":[{"vendor":"wordpress","product":"wordpress_mu"}],"references":[{"url":"http://www.securityfocus.com/bid/34075","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.securitytracker.com/id?1021838","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/49184","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/501667/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://marc.info/?l=bugtraq\u0026m=126996727024732\u0026w=2","tags":["vendor-advisory","x_refsource_HP","x_transferred"]},{"url":"https://www.exploit-db.com/exploits/8196","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-1030"},{"url":"https://github.com/advisories/GHSA-fg2g-28hw-pqvr"}],"sources":{"cve":[{"id":"CVE-2009-1030","description":"Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu-functions.php in WordPress MU (WPMU) before 2.7 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.","status":"published","published":"2009-03-20T00:00:00Z","modified":"2024-08-07T04:57:17.511Z","updated_at":"2026-11-02T14:33:25.126493Z"}],"euvd":[{"id":"EUVD-2009-1031","description":"Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu-functions.php in WordPress MU (WPMU) before 2.7 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.","status":"published","published":"2009-03-20T00:00:00Z","modified":"2024-08-07T04:57:17Z","updated_at":"2026-11-03T01:39:23.366568Z"}],"ghsa":[{"id":"GHSA-fg2g-28hw-pqvr","title":"Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu...","description":"Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu-functions.php in WordPress MU (WPMU) before 2.7 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.","status":"published","published":"2022-05-02T03:21:07Z","modified":"2023-01-31T05:06:59Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:49:07.796746Z"}],"nvd":[{"id":"CVE-2009-1030","description":"Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu-functions.php in WordPress MU (WPMU) before 2.7 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.","status":"published","published":"2009-03-20T00:30:00.703Z","modified":"2026-06-16T23:06:21.277Z","cvss":[{"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":"2026-11-02T14:01:34.44527Z"}]}}