CVE-2017-7491

CVE-2017-7491 is a medium-severity vulnerability in Moodle with a CVSS 3.x 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-352.

Key facts

• Severity: Medium (CVSS 3.x base score 4.3)
• CVSS v2: 4.3
• EPSS exploit prediction: 1% (40th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-352
• Affected product: Moodle
• Published: 2017-05-15
• Last modified: 2026-06-17

Description

In Moodle 2.x and 3.x, a CSRF attack is possible that allows attackers to change the "number of courses displayed in the course overview block" configuration setting.

Frequently asked questions

What is CVE-2017-7491?

In Moodle 2.x and 3.x, a CSRF attack is possible that allows attackers to change the "number of courses displayed in the course overview block" configuration setting.

How severe is CVE-2017-7491?

CVE-2017-7491 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2017-7491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7491?

CVE-2017-7491 primarily affects Moodle. In total, 53 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-7491?

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

When was CVE-2017-7491 published?

CVE-2017-7491 was published on 2017-05-15 and last updated on 2026-06-17.

References

• https://moodle.org/mod/forum/discuss.php?d=352355

Affected products (53)

• cpe:2.3:a:moodle:moodle:2.7.0:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.0:beta:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.4:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.5:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.6:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.7:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.8:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.10:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.11:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.12:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.13:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.14:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.15:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.16:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.17:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:2.7.18:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.0:beta:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.0:rc4:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.1.0:beta:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.1.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:moodle:moodle:3.1.0:rc2:*:*:*:*:*:*

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