CVE-2013-1337

7.5 HIGH 21% exploit odds No fix listed Auth & access OS & kernel

What it is

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."

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 20.6% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2013-01-12 00:00 UTC ReservedThe CVE id was reserved by its CNA
2013-05-15 03:36 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:51 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 20.6% in the next 30 days (EPSS).
Severity: 7.5 HIGH (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2013-05-15 03:36 UTC
Last modified: 2026-06-16 23:51 UTC
Exploit probability: 20.6% · EPSS, next 30 days
Weakness: CWE-287 · Improper authentication
Record status: Modified

Affected

Microsoft .net Framework 4.5

Attack profile CVSS 2.0 · 7.5

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: Partial
Integrity: Partial
Availability: Partial

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2013-1337.md and follow it. Check whether this project is affected by CVE-2013-1337. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record