How severe is CVE-2013-6455?

CVE-2013-6455 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2013-6455 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6455?

CVE-2013-6455 affects Mediawiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-6455?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-6455 published?

CVE-2013-6455 was published on 2020-01-28 and last updated on 2026-06-17.

CVE-2013-6455

CVE-2013-6455 is a medium-severity vulnerability in Mediawiki with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Mediawiki
Published: 2020-01-28
Last modified: 2026-06-17

Description

The CentralAuth extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to obtain usernames via vectors related to writing the names to the DOM of a page.

Frequently asked questions

What is CVE-2013-6455?: The CentralAuth extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to obtain usernames via vectors related to writing the names to the DOM of a page.
How severe is CVE-2013-6455?: CVE-2013-6455 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2013-6455 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6455?: CVE-2013-6455 affects Mediawiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-6455?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6455 published?: CVE-2013-6455 was published on 2020-01-28 and last updated on 2026-06-17.

References

http://lists.wikimedia.org/pipermail/mediawiki-announce/2014-January/000138.html

Affected products (1)

cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*

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