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CVE-2008-3842

21
FAUCET Score

CVE-2008-3842 describes a cross-site scripting (XSS) vulnerability in ASP.NET within Microsoft .NET Framework versions prior to the MS07-040 update, affecting various Windows operating systems. The vulnerability stems from insufficient request validation, allowing attackers to inject malicious scripts via dangerous client input like a "</" sequence in query strings. With a CVSS score of 4.3 (medium severity), this vulnerability has a network attack vector, medium attack complexity, and a potential impact of partial integrity compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.0CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:2.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:1.1:sp1:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:1.0:sp3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
20.42%
Probability of exploitation in next 30 days
EPSS Percentile
97.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.2042 is in the 98th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

securityreason.com / securityalert/4193
Third Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/44741
procheckup.com / PDFs/bypassing-dot-NET-ValidateRequest.pdf
Broken Link
securityfocus.com / archive/1/495667/100/0/threaded