7.5

CVE-2013-1337: microsoft .net_framework Improper Authentication

CVSS: 7.5v2.0HighModified
Published 15-05-2013Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2013-1337 is a high (CVSS 7.5) Improper Authentication vulnerability in microsoft .net_framework. EPSS estimates a 20.63% chance of exploitation in the next 30 days, higher than 97.5% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v2.0 (NVD)
EPSS score
20.63%
0%100%
High · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-05-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

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."

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

20.63%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

0.00 pp

From 20.63% on 19-09-2026

19-09-202619-10-2026
EPSS score
20.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft1 product

1 vendor · 1 product

References

3 links