How severe is CVE-2013-4301?

CVE-2013-4301 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2013-4301 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4301?

CVE-2013-4301 primarily affects Mediawiki. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4301?

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

When was CVE-2013-4301 published?

CVE-2013-4301 was published on 2013-10-27 and last updated on 2026-06-16.

CVE-2013-4301

CVE-2013-4301 is a medium-severity vulnerability in Mediawiki with a CVSS 2.0 base score of 5.0. 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 2.0 base score 5.0)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Mediawiki
Published: 2013-10-27
Last modified: 2026-06-16

Description

includes/resourceloader/ResourceLoaderContext.php in MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 allows remote attackers to obtain sensitive information via a "<" (open angle bracket) character in the lang parameter to w/load.php, which reveals the installation path in an error message.

Frequently asked questions

What is CVE-2013-4301?: includes/resourceloader/ResourceLoaderContext.php in MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 allows remote attackers to obtain sensitive information via a "<" (open angle bracket) character in the lang parameter to w/load.php, which reveals the installation path in an error message.
How severe is CVE-2013-4301?: CVE-2013-4301 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2013-4301 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4301?: CVE-2013-4301 primarily affects Mediawiki. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4301?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4301 published?: CVE-2013-4301 was published on 2013-10-27 and last updated on 2026-06-16.

References

Affected products (17)

cpe:2.3:a:mediawiki:mediawiki:1.19.0:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.19.1:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.19.2:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.19.3:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.19.4:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.19.5:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.19.6:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.19.7:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20.1:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20.2:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20.3:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20.4:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20.5:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20.6:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.1:*:*:*:*:*:*:*

More vulnerabilities in Mediawiki

CVE-2025-67484 — Critical (CVSS 9.8): Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files…
CVE-2024-34502 — Critical (CVSS 9.8): An issue was discovered in WikibaseLexeme in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1.…
CVE-2023-37303 — Critical (CVSS 9.8): An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In certain situations, an attempt to…
CVE-2023-29141 — Critical (CVSS 9.8): An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6, and 1.39.x before 1.39.3. An…
CVE-2022-29906 — Critical (CVSS 9.8): The admin API module in the QuizGame extension for MediaWiki through 1.37.2 (before…
CVE-2022-29904 — Critical (CVSS 9.8): The SemanticDrilldown extension for MediaWiki through 1.37.2 (before e688bdba6434591b5dff689a45e4d53459954773) allows…

All CVEs affecting Mediawiki →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →