CVE-2008-3842

Name: CVE-2008-3842
Creator: NVD / NIST
Published: 2008-08-27T20:41:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 20.42%

Last modified Jun 16, 2026

CVE-2008-3842 is a vulnerability of currently unknown severity. Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework without the MS07-040 update does not properly detect dangerous client input, which allows remote attackers to conduct cross-site scripting (XSS) attacks, as demonstrated by a query string containing a "</" (less-than slash) sequence.. EPSS estimates a 20.42% chance of exploitation in the next 30 days.

Description

Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework without the MS07-040 update does not properly detect dangerous client input, which allows remote attackers to conduct cross-site scripting (XSS) attacks, as demonstrated by a query string containing a "</" (less-than slash) sequence.

Metrics

EPSS Probability

20.42%

97.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Microsoft	.Net Framework	2.0	—
Microsoft	.Net Framework	1.1	Sp1
Microsoft	.Net Framework	1.0	Sp3

References

Timeline

Published: Aug 27, 2008
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2008-3842?

How severe is CVE-2008-3842?

Severity scoring for CVE-2008-3842 is pending analysis. The EPSS model estimates a 20.42% probability of exploitation in the next 30 days.

How do I fix CVE-2008-3842?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2008-3842?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST