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CVE-2008-3842
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework without the MS07-040 update does not properly…
Medium4.3EPSS 20.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 20.4% · top 2.5% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
Affected products
n/a
- affected n/a
References (4)
- http://www.procheckup.com/PDFs/bypassing-dot-NET-ValidateRequest.pdf (opens in a new tab)x_refsource_MISCx_transferred
- 4193 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- 20080821 PR08-20: Bypassing ASP .NET "ValidateRequest" for Script Injection Attacks (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- asp-validaterequest-xss(44741) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2008-3842)Record last updated .