CVE-2006-0805

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2006-02-21 · updated 2026-06-16

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.

Affected products

Francisco Burzi Php-Nuke: 6.0, 6.5, 6.5_beta1, 6.5_final, 6.5_rc1, 6.5_rc2 (+15)

References

http://secunia.com/advisories/18936
http://securityreason.com/securityalert/455
http://www.securityfocus.com/archive/1/425394/100/0/threaded
http://www.securityfocus.com/bid/16722
http://www.waraxe.us/advisory-45.html
http://secunia.com/advisories/18936
http://securityreason.com/securityalert/455
http://www.securityfocus.com/archive/1/425394/100/0/threaded
http://www.securityfocus.com/bid/16722
http://www.waraxe.us/advisory-45.html

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