9.8

CVE-2013-4366: apache httpclient Improper Input Validation

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2013-4366DEBIAN-CVE-2013-4366GHSA-pqwh-44jj-p5rm
Published 30-10-2017Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2013-4366 is a critical (CVSS 9.8) Improper Input Validation vulnerability in apache httpclient. EPSS estimates a 3.31% chance of exploitation in the next 30 days, higher than 88.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
3.31%
0%100%
Low · +1.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-10-2017
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

http/impl/client/HttpClientBuilder.java in Apache HttpClient 4.3.x before 4.3.1 does not ensure that X509HostnameVerifier is not null, which allows attackers to have unspecified impact via vectors involving hostname verification.

CVSS metrics

6 scores · 4 sources · 3 versions

EPSS trend

Probability

3.31%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

+1.11 pp

From 2.20% on 20-09-2026

20-09-202620-10-2026
EPSS score
3.31%

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

Apache1 product
  • httpclient4.3 | 4.3:alpha1 | 4.3:beta1 | 4.3:beta2
Debian1 product
  • httpcomponents-client< 4.3.2-1
Org.apache.httpcomponents1 product
  • httpclient≥ 4.3, < 4.3.1
Ubuntu1 product
  • httpcomponents-client< 4.3.3-1 | < 4.5.1-1

4 vendors · 4 products

References

7 links