Is CVE-2013-4306 in the CISA KEV catalog?

No. CVE-2013-4306 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-4306?

CVE-2013-4306 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2013-4306?

CVE-2013-4306 has an EPSS score of 0.90% (55th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-4306?

Upgrade mediawiki to 1.21.2 or later.

CVE & CISA-KEV Catalog

CVE-2013-4306

MEDIUM

6.8

CVSS v2

NVD

Description

Cross-site request forgery (CSRF) vulnerability in api/ApiQueryCheckUser.php in the CheckUser extension for MediaWiki, possibly Checkuser before 2.3, allows remote attackers to hijack the authentication of arbitrary users for requests that "perform sensitive write actions" via unspecified vectors.

CWE-352Cross-Site Request Forgery

How to fix

Remediation Available

mediawikiNVD

Affected:>= 1.21.0, < 1.21.2Fixed in:1.21.2CVE-2013-4306derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

0.90%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Patch3

Third-Party Advisory2

VDB Entry1

exchange.xforce.ibmcloud.com

Other references1

osvdb.org

Related Vulnerabilities

Other CWE-352 (Cross-Site Request Forgery) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-6277	High	8.8	100%	KEV	-
CVE-2014-0054	Medium	6.8	91%	-	Fix
CVE-2013-6429	Medium	6.8	90%	-	Fix
CVE-2022-41622	High	8.8	88%	-	-
CVE-2018-7700	High	8.8	75%	-	-
CVE-2015-2295	Medium	6.8	66%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.