How severe is CVE-2013-4525?

CVE-2013-4525 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2013-4525 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4525?

CVE-2013-4525 primarily affects Moodle. In total, 118 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4525?

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

When was CVE-2013-4525 published?

CVE-2013-4525 was published on 2013-11-26 and last updated on 2026-06-16.

CVE-2013-4525

CVE-2013-4525 is a low-severity vulnerability in Moodle with a CVSS 2.0 base score of 3.5. 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: Low (CVSS 2.0 base score 3.5)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Moodle
Published: 2013-11-26
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in mod/quiz/report/responses/responses_table.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 allows remote authenticated users to inject arbitrary web script or HTML via an answer to a text-based quiz question.

Frequently asked questions

What is CVE-2013-4525?: Cross-site scripting (XSS) vulnerability in mod/quiz/report/responses/responses_table.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 allows remote authenticated users to inject arbitrary web script or HTML via an answer to a text-based quiz question.
How severe is CVE-2013-4525?: CVE-2013-4525 has a CVSS 2.0 base score of 3.5, rated low severity.
Is CVE-2013-4525 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4525?: CVE-2013-4525 primarily affects Moodle. In total, 118 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4525?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4525 published?: CVE-2013-4525 was published on 2013-11-26 and last updated on 2026-06-16.

References

Affected products (118)

cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.3.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.3.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.4.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.4.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.5.0:beta:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.5.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.5.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.6.8:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.7.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.7.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.7.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.7.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.7.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.7.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.6:*:*:*:*:*:*:*

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