How severe is CVE-2013-5674?

CVE-2013-5674 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2013-5674 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-2013-5674?

CVE-2013-5674 primarily affects Moodle. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-5674?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-5674 published?

CVE-2013-5674 was published on 2013-09-16 and last updated on 2026-06-16.

CVE-2013-5674

CVE-2013-5674 is a high-severity vulnerability in Moodle with a CVSS 2.0 base score of 7.5. 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-94.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Moodle
Published: 2013-09-16
Last modified: 2026-06-16

Description

badges/external.php in Moodle 2.5.x before 2.5.2 does not properly handle an object obtained by unserializing a description of an external badge, which allows remote attackers to conduct PHP object injection attacks via unspecified vectors, as demonstrated by overwriting the value of the userid parameter.

Frequently asked questions

What is CVE-2013-5674?: badges/external.php in Moodle 2.5.x before 2.5.2 does not properly handle an object obtained by unserializing a description of an external badge, which allows remote attackers to conduct PHP object injection attacks via unspecified vectors, as demonstrated by overwriting the value of the userid parameter.
How severe is CVE-2013-5674?: CVE-2013-5674 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2013-5674 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-2013-5674?: CVE-2013-5674 primarily affects Moodle. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-5674?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-5674 published?: CVE-2013-5674 was published on 2013-09-16 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:moodle:moodle:2.5.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.5.1:*:*:*:*:*:*:*

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