vBulletin Cross-Site Scripting Vulnerability in Login Component

Vulnerability

A cross-site scripting vulnerability has been identified in vBulletin versions 6.x, specifically within the Login component. This issue allows for remote exploitation by manipulating an unknown function, leading to the injection of malicious scripts. The details of the exploit have been made public, although VulDB is withholding certain information to prevent easier exploitation.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Added: May 26, 2026, 8:55 PM
Updated: May 26, 2026, 8:55 PM

Vulnerability Rating

Custom Algorithm
spread
6.4
impact
1.7
exploitability
7.9
remediation
0.0
relevance
9.3
threat
6.4
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.