What’s Vulnerable › Vulnerabilities

CVE-2013-1337

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 20.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2013-05-15 · updated 2026-06-16
• Weakness: CWE-287

Description

Microsoft .NET Framework 4.5 does not properly create policy requirements for custom Windows Communication Foundation (WCF) endpoint authentication in certain situations involving passwords over HTTPS, which allows remote attackers to bypass authentication by sending queries to an endpoint, aka "Authentication Bypass Vulnerability."

Affected products

• Microsoft .NET Framework: 4.5

References

• http://www.us-cert.gov/ncas/alerts/TA13-134A
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-040
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16741
• http://www.us-cert.gov/ncas/alerts/TA13-134A
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-040
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16741

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