{"id":"CVE-2006-0805","aliases":["EUVD-2006-0811","GHSA-7q52-9rpc-8p4f"],"status":"published","title":"The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that...","description":"The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that only vary once per day based on the User Agent (HTTP_USER_AGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the random_num and gfx_check parameters.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02996,"percentile":0.8746,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2006-02-21T02:00:00Z","modified":"2026-06-16T22:21:19Z","exploits":[{"source":"exploitdb","id":"EDB-27249","title":"PHP-Nuke 7.x - CAPTCHA Bypass","type":"webapps","platform":"php","date":"2006-02-18","verified":true,"url":"https://www.exploit-db.com/exploits/27249"}],"products":[{"vendor":"francisco_burzi","product":"php-nuke"}],"references":[{"url":"http://www.securityfocus.com/bid/16722","tags":["vdb-entry","x_refsource_BID","x_transferred","Exploit"]},{"url":"http://securityreason.com/securityalert/455","tags":["third-party-advisory","x_refsource_SREASON","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/425394/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://secunia.com/advisories/18936","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://www.waraxe.us/advisory-45.html","tags":["x_refsource_MISC","x_transferred","Exploit","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-0805"},{"url":"https://github.com/advisories/GHSA-7q52-9rpc-8p4f"}],"sources":{"cve":[{"id":"CVE-2006-0805","description":"The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that only vary once per day based on the User Agent (HTTP_USER_AGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the random_num and gfx_check parameters.","status":"published","published":"2006-02-21T02:00:00Z","modified":"2024-08-07T16:48:56.622Z","updated_at":"2026-11-02T14:33:52.569914Z"}],"euvd":[{"id":"EUVD-2006-0811","description":"The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that only vary once per day based on the User Agent (HTTP_USER_AGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the random_num and gfx_check parameters.","status":"published","published":"2006-02-21T02:00:00Z","modified":"2024-08-07T16:48:56Z","updated_at":"2026-11-03T01:16:07.583831Z"}],"ghsa":[{"id":"GHSA-7q52-9rpc-8p4f","title":"The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that...","description":"The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that only vary once per day based on the User Agent (HTTP_USER_AGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the random_num and gfx_check parameters.","status":"published","published":"2022-05-01T06:42:55Z","modified":"2023-01-31T05:00:39Z","updated_at":"2026-11-02T14:47:54.245378Z"}],"nvd":[{"id":"CVE-2006-0805","description":"The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that only vary once per day based on the User Agent (HTTP_USER_AGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the random_num and gfx_check parameters.","status":"published","published":"2006-02-21T02:02:00Z","modified":"2026-06-16T22:21:19.393Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:01:00.920802Z"}]}}