CVE-2011-5251 – vBulletin – Multiple Open Redirects Overview
Open redirect vulnerability in forum/login.php in vBulletin 4.1.3 and earlier allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via the url parameter in a lostpw action.

Impact
CVSS Severity (version 2.0):

CVSS v2 Base Score:5.8 (MEDIUM) (AV:N/AC:M/Au:N/C:P/I:P/A:N) (legend)
Impact Subscore: 4.9
Exploitability Subscore: 8.6

CVSS Version 2 Metrics:
Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification

References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: http://www.vbulletin.com/forum/showthread.php/381014-Potential-Phishing-Vector?p=2166441
Hyperlink:http://www.vbulletin.com/forum/showthread.php/381014-Potential-Phishing-Vector?p=2166441

Vulnerable software and versions

Configuration 1
OR
* cpe:/a:vbulletin:vbulletin:4.1.3 and previous versions
* cpe:/a:vbulletin:vbulletin:4.1.2
* cpe:/a:vbulletin:vbulletin:4.1.1
* cpe:/a:vbulletin:vbulletin:4.1
* cpe:/a:vbulletin:vbulletin:4.0.8
* cpe:/a:vbulletin:vbulletin:4.0.7
* cpe:/a:vbulletin:vbulletin:4.0.6
* cpe:/a:vbulletin:vbulletin:4.0.5
* cpe:/a:vbulletin:vbulletin:4.0.4
* cpe:/a:vbulletin:vbulletin:4.0.3
* cpe:/a:vbulletin:vbulletin:4.0.2
* cpe:/a:vbulletin:vbulletin:4.0.1
* cpe:/a:vbulletin:vbulletin:4.0.0
* Denotes Vulnerable Software
* Changes related to vulnerability configurations
Technical Details
Vulnerability Type (View All)
Input Validation (CWE-20)
CVE Standard Vulnerability Entry: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-5251