What’s Vulnerable › Vulnerabilities

CVE-2021-3943

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-22 · updated 2026-06-17
• Weakness: CWE-20

Description

A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A remote code execution risk when restoring backup files was identified.

Affected products

• Moodle: from 3.9.0 through 3.9.10; from 3.10.0 through 3.10.7; from 3.11.0 through 3.11.3

References

• https://bugzilla.redhat.com/show_bug.cgi?id=2021963
• https://moodle.org/mod/forum/discuss.php?d=429095
• https://bugzilla.redhat.com/show_bug.cgi?id=2021963
• https://moodle.org/mod/forum/discuss.php?d=429095

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