CVE-2006-0805

CVE-2006-0805 is a high-severity vulnerability in Francisco Burzi Php-nuke with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

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.

Frequently asked questions

What is CVE-2006-0805?
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.
How severe is CVE-2006-0805?
CVE-2006-0805 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2006-0805 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-0805?
CVE-2006-0805 primarily affects Francisco Burzi Php-nuke. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-0805?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-0805 published?
CVE-2006-0805 was published on 2006-02-21 and last updated on 2026-06-16.

References

Affected products (21)

More vulnerabilities in Francisco Burzi Php-nuke

All CVEs affecting Francisco Burzi Php-nuke →