7.5

CVE-2013-4304: brion_vibber centralauth_extension Improper Authentication

CVSS: 7.5v2.0HighModified
Published 26-01-2014Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2013-4304 is a high (CVSS 7.5) Improper Authentication vulnerability in brion_vibber centralauth_extension. EPSS estimates a 2.08% chance of exploitation in the next 30 days, higher than 81.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v2.0 (NVD)
EPSS score
2.08%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 26-01-2014
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The CentralAuth extension for MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 caches a valid CentralAuthUser object in the centralauth_User cookie even when a user has not successfully logged in, which allows remote attackers to bypass authentication without a password.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.08%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

0.00 pp

From 2.08% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.08%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.wikimedia.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Brion_vibber1 product
Mediawiki1 product
  • mediawiki1.19 | 1.19:beta_1 | 1.19:beta_2 | 1.19.0 | 1.19.1 | 1.19.2 | 1.19.3 | 1.19.4 | 1.19.5 | 1.19.6 | 1.19.7 | 1.20 | 1.20.1 | 1.20.2 | 1.20.3 | 1.20.4 | 1.20.5 | 1.20.6 | 1.21 | 1.21.1

2 vendors · 2 products

References

6 links