Is CVE-2005-4260 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2005-4260, but active exploitation has not been confirmed.

Can CVE-2005-4260 be exploited remotely?

Yes. CVE-2005-4260 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2005-4260?

CVE-2005-4260 has a CVSS score of 4.3 (MEDIUM).

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MEDIUMPOC

CVE-2005-4260

NVD-CWE-OtherPublished: December 15, 2005· Updated: Jun 16, 2026

4.3

CVSS v3.1

Official Description

Interpretation conflict in includes/mainfile.php in PHP-Nuke 7.9 and later allows remote attackers to perform cross-site scripting (XSS) attacks by replacing the ">" in the tag with a "<", which bypasses the regular expressions that sanitize the data, but is automatically corrected by many web browsers. NOTE: it could be argued that this vulnerability is due to a design limitation of many web browsers; if so, then this should not be treated as a vulnerability in PHP-Nuke.

NVD Source

Technical Analysis

CVE-2005-4260 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2005-4260. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.