CVE-2011-3415

What it is

Open redirect vulnerability in the Forms Authentication feature in the ASP.NET subsystem in Microsoft .NET Framework 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a crafted return URL, aka "Insecure Redirect in .NET Form Authentication Vulnerability."

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

23.0% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2011-12-30 01:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:33 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 23.0% in the next 30 days (EPSS).
• Severity: 6.8 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2011-12-30 01:55 UTC

Last modified

2026-06-16 23:33 UTC

Exploit probability

23.0% · EPSS, next 30 days

Weakness

CWE-20 · Improper input validation

Record status

Modified

Affected

• Microsoft Windows 7
• Microsoft Windows Server 2003
• Microsoft Windows Server 2008
• Microsoft Windows Server 2008 r2
• Microsoft Windows Vista
• Microsoft Windows Xp
• Microsoft Windows Xp sp3

Attack profile CVSS 2.0 · 6.8

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2011-3415.md and follow it. Check whether this project is affected by CVE-2011-3415. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge