CVE-2008-3843
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with...
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with 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 tilde slash) sequence followed by a crafted STYLE element.
Exploit likelihood
What each source reports
NVD Score used
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with 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 tilde slash) sequence followed by a crafted STYLE element.
- Record
CVE-2008-3843- 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 with 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 tilde slash) sequence followed by a crafted STYLE element.
- Record
CVE-2008-3843- Updated
- 2026-11-02
EUVDEUVD-2008-3829 No score
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with 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 tilde slash) sequence followed by a crafted STYLE element.
- Record
EUVD-2008-3829- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-35fc-6m3p-h4pm No score
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with...
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with 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 tilde slash) sequence followed by a crafted STYLE element.
- Record
GHSA-35fc-6m3p-h4pm- 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-2008-3843 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 22.0%, the 97th percentile. No source names a fixed version.
References
securityfocus.com/archive/1/496071/100/0/threaded
exchange.xforce.ibmcloud.com/vulnerabilities/44743
procheckup.com/PDFs/bypassing-dot-NET-ValidateRequest.pdf
securityreason.com/securityalert/4193
nvd.nist.gov/vuln/detail/CVE-2008-3843
github.com/advisories/GHSA-35fc-6m3p-h4pm