CVE-2006-3253
NVD-CWE-OtherPublished: June 28, 2006· Updated: Jun 16, 2026
Official Description
Cross-site scripting (XSS) vulnerability in member.php in vBulletin 3.5.x allows remote attackers to inject arbitrary web script or HTML via the u parameter. NOTE: the vendor has disputed this report, stating that they have been unable to replicate the issue and that "the userid parameter is run through our filtering system as an unsigned integer.
Technical Analysis
CVE-2006-3253 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-2006-3253. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
All References (14)
Quick Facts
Related CVEs (NVD-CWE-Other)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2006-3253 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts