How severe is CVE-2013-4941?

CVE-2013-4941 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-4941 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4941?

CVE-2013-4941 primarily affects Moodle. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4941?

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

When was CVE-2013-4941 published?

CVE-2013-4941 was published on 2013-07-29 and last updated on 2026-06-16.

CVE-2013-4941

CVE-2013-4941 is a medium-severity vulnerability in Moodle 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: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Moodle
Published: 2013-07-29
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo! YUI 3.2.0 through 3.9.1, as used in Moodle through 2.1.10, 2.2.x before 2.2.11, 2.3.x before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.1, and other products, allows remote attackers to inject arbitrary web script or HTML via a crafted string in a URL.

Frequently asked questions

What is CVE-2013-4941?: Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo! YUI 3.2.0 through 3.9.1, as used in Moodle through 2.1.10, 2.2.x before 2.2.11, 2.3.x before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.1, and other products, allows remote attackers to inject arbitrary web script or HTML via a crafted string in a URL.
How severe is CVE-2013-4941?: CVE-2013-4941 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-4941 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4941?: CVE-2013-4941 primarily affects Moodle. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4941?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4941 published?: CVE-2013-4941 was published on 2013-07-29 and last updated on 2026-06-16.

References

Affected products (58)

cpe:2.3:a:moodle:moodle:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.8:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.9:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.10:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.8:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.9:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.10:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.3.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.4.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.4.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.4.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.4.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.4.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.5.0:*:*:*:*:*:*:*
cpe:2.3:a:yahoo:yui:3.0.0:*:*:*:*:*:*:*
cpe:2.3:a:yahoo:yui:3.1.0:*:*:*:*:*:*:*
cpe:2.3:a:yahoo:yui:3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:yahoo:yui:3.1.2:*:*:*:*:*:*:*

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