CVE-2008-3843 json
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with the MS07-040 update does not properly dete…
published 2008-08-27 18 y ago modified 2026-06-16 4 mo ago also EUVD-2008-3829
- cvss
- 4.3
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 22.0%
- EPSS 22.0% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
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 prediction
21.99% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
securityfocus.com
/archive/1/496071/100/0/threaded
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/44743
vdb-entry
- procheckup.com /PDFs/bypassing-dot-NET-ValidateRequest.pdf
-
securityreason.com
/securityalert/4193
third-party-advisory
-
securityfocus.com
/archive/1/495667/100/0/threaded
mailing-list
- procheckup.com /Vulnerability_PR08-20.php
Sources
- CVE List CVE-2008-3843
- NVD CVE-2008-3843
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.