How severe is CVE-2015-2941?

CVE-2015-2941 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-2941 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2941?

CVE-2015-2941 primarily affects Mediawiki. In total, 49 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-2941?

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

When was CVE-2015-2941 published?

CVE-2015-2941 was published on 2015-04-13 and last updated on 2026-06-17.

CVE-2015-2941

CVE-2015-2941 is a medium-severity vulnerability in Mediawiki with a CVSS 2.0 base score of 4.3. 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-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mediawiki
Published: 2015-04-13
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in MediaWiki before 1.19.24, 1.2x before 1.23.9, and 1.24.x before 1.24.2, when using HHVM, allows remote attackers to inject arbitrary web script or HTML via an invalid parameter in a wddx format request to api.php, which is not properly handled in an error message, related to unsafe calls to wddx_serialize_value.

Frequently asked questions

What is CVE-2015-2941?: Cross-site scripting (XSS) vulnerability in MediaWiki before 1.19.24, 1.2x before 1.23.9, and 1.24.x before 1.24.2, when using HHVM, allows remote attackers to inject arbitrary web script or HTML via an invalid parameter in a wddx format request to api.php, which is not properly handled in an error message, related to unsafe calls to wddx_serialize_value.
How severe is CVE-2015-2941?: CVE-2015-2941 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-2941 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2941?: CVE-2015-2941 primarily affects Mediawiki. In total, 49 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-2941?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-2941 published?: CVE-2015-2941 was published on 2015-04-13 and last updated on 2026-06-17.

References

Affected products (49)

cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
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:1.20.7:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.20.8:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.1:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.2:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.3:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.4:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.5:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.6:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.7:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.8:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.9:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.10:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.21.11:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.0:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.1:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.2:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.3:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.4:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.5:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.6:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.7:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.8:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.9:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.10:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.11:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.12:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.13:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.14:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.22.15:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.23.0:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.23.1:*:*:*:*:*:*:*

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