CVE-2008-3842
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2008-3842- CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2008-3842- Updated
- 2026-11-02
EUVDEUVD-2008-3828 No score
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.
- Record
EUVD-2008-3828- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jc59-w8vh-r622 No score
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework...
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.
- Record
GHSA-jc59-w8vh-r622- Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2008-3842 is a medium vulnerability (CVSS 4.3) in Microsoft .net Framework, published August 27, 2008. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 20.4%, the 97th percentile. No source names a fixed version.