CVE-2025-67851 Moodle: moodle: formula injection allows arbitrary formula execution via unescaped data export

What is CVE-2025-67851?

CVE-2025-67851 is a medium-severity code injection vulnerability in Moodle Moodle, published on 3 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A flaw was found in moodle. This formula injection vulnerability occurs when data fields are exported without proper escaping. A remote attacker could exploit this by providing malicious data that, when exported and opened in a spreadsheet, allows arbitrary formulas to execute. This can lead to compromised data integrity and unintended operations within the spreadsheet.

Weakness: CWE-1236

Which versions are affected by CVE-2025-67851?

11 open source packages ship an affected version, including moodle/moodle and moodle. It affects 1 product.

Products include Moodle Moodle.

How do I fix CVE-2025-67851?

Upgrade moodle/moodle to a fixed version for your release line: 4.1.22, 4.4.12, 4.5.8 or 5.0.4.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2025-67851 being exploited?

There is no known exploitation of CVE-2025-67851 in the wild and no public exploit code.

Other vulnerabilities in Moodle Moodle

• CVE-2006-4935 File upload in n/a Critical 10.0
• CVE-2006-4936 Moodle does not properly validate module instance id Critical 10.0
• CVE-2004-2233 Unknown "front page vulnerability with Moodle servers" for Moodle before 1.3.2 has unknown impact and attack vectors. Critical 10.0
• CVE-2004-2235 Cross-site scripting in n/a Critical 10.0
• CVE-2004-2236 Other in n/a Critical 10.0

All Moodle Moodle vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-moodle-2025-67851, GHSA-qfh6-h7j6-fvjv, UBUNTU-CVE-2025-67851.