What’s Vulnerable › Vulnerabilities

CVE-2023-5544: Moodle: stored xss and potential idor risk in wiki comments

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-09 · updated 2026-06-17
• Weakness: CWE-79

Description

Wiki comments required additional sanitizing and access restrictions to prevent a stored XSS risk and potential IDOR risk.

Affected products

• Fedoraproject Fedora: 37, 38, 39
• Moodle: from 3.9.0 before 3.9.24; from 3.11.0 before 3.11.17; from 4.0.0 before 4.0.11; from 4.1.0 before 4.1.6; from 4.2.0 before 4.2.3 — fixed in 3.11.17, 3.9.24, 4.0.11, 4.1.6, 4.2.3
• Red Hat Enterprise Linux: 7.0

How to fix

Upgrade to a fixed version: Moodle 3.11.17, 3.9.24, 4.0.11, 4.1.6. Check the vendor advisory for mitigations.

References

• http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79509
• https://bugzilla.redhat.com/show_bug.cgi?id=2243443
• https://moodle.org/mod/forum/discuss.php?d=451585
• http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79509
• https://bugzilla.redhat.com/show_bug.cgi?id=2243443
• https://moodle.org/mod/forum/discuss.php?d=451585

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