What’s Vulnerable › Vulnerabilities

CVE-2021-40694

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-29 · updated 2026-06-17
• Weakness: CWE-116

Description

Insufficient escaping of the LaTeX preamble made it possible for site administrators to read files available to the HTTP server system account.

Affected products

• Moodle: before 3.9.10; from 3.10.0 before 3.10.7; from 3.11.0 before 3.11.3 — fixed in 3.10.7, 3.11.3, 3.9.10

How to fix

Upgrade to a fixed version: Moodle 3.10.7, 3.11.3, 3.9.10. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=2043421
• https://bugzilla.redhat.com/show_bug.cgi?id=2043421

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