What’s Vulnerable › Vulnerabilities

CVE-2024-33997: moodle: stored XSS risk when editing another user's equation in equation editor

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-31 · updated 2026-06-17
• Weakness: CWE-79

Description

Additional sanitizing was required when opening the equation editor to prevent a stored XSS risk when editing another user's equation.

Affected products

• Moodle: before 4.1.10; from 4.2.0 before 4.2.7; from 4.3.0 before 4.3.4 — fixed in 4.1.10, 4.2.7, 4.3.4

How to fix

Upgrade to a fixed version: Moodle 4.1.10, 4.2.7, 4.3.4. Check the vendor advisory for mitigations.

References

• https://moodle.org/mod/forum/discuss.php?d=458385
• https://moodle.org/mod/forum/discuss.php?d=458385

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