CVE-2006-0805

Exp

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.

Published: 2006-02-21 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-0805 is rated High Exploit Risk (72.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.76%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2006-0805

EDB-ID Source Kind Published Link
27249 exploit_db edb 2006-02-18 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2006-0805

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 2.39% 1.76% -0.63%
2 2025-03-29 1.76% 2.39% +0.63%
3 2025-03-17 — 1.76% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-0805

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2006-0805

Affected software / configurations for CVE-2006-0805

Vendor Product Version Raw CPE
francisco_burzi php-nuke 6.0 cpe:2.3:a:francisco_burzi:php-nuke:6.0:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.5 cpe:2.3:a:francisco_burzi:php-nuke:6.5:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.5_beta1 cpe:2.3:a:francisco_burzi:php-nuke:6.5_beta1:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.5_final cpe:2.3:a:francisco_burzi:php-nuke:6.5_final:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.5_rc1 cpe:2.3:a:francisco_burzi:php-nuke:6.5_rc1:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.5_rc2 cpe:2.3:a:francisco_burzi:php-nuke:6.5_rc2:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.5_rc3 cpe:2.3:a:francisco_burzi:php-nuke:6.5_rc3:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.6 cpe:2.3:a:francisco_burzi:php-nuke:6.6:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.7 cpe:2.3:a:francisco_burzi:php-nuke:6.7:*:*:*:*:*:*:*
francisco_burzi php-nuke 6.9 cpe:2.3:a:francisco_burzi:php-nuke:6.9:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.0 cpe:2.3:a:francisco_burzi:php-nuke:7.0:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.0_final cpe:2.3:a:francisco_burzi:php-nuke:7.0_final:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.1 cpe:2.3:a:francisco_burzi:php-nuke:7.1:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.2 cpe:2.3:a:francisco_burzi:php-nuke:7.2:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.3 cpe:2.3:a:francisco_burzi:php-nuke:7.3:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.4 cpe:2.3:a:francisco_burzi:php-nuke:7.4:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.5 cpe:2.3:a:francisco_burzi:php-nuke:7.5:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.6 cpe:2.3:a:francisco_burzi:php-nuke:7.6:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.7 cpe:2.3:a:francisco_burzi:php-nuke:7.7:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.8 cpe:2.3:a:francisco_burzi:php-nuke:7.8:*:*:*:*:*:*:*
francisco_burzi php-nuke 7.9 cpe:2.3:a:francisco_burzi:php-nuke:7.9:*:*:*:*:*:*:*

References for CVE-2006-0805

cvelogic Threat Intelligence