by Michael Hawkins. Insufficient sanitizing when exporting data to CSV / XLSX format could result in malicious formulas being inserted into the files. Note: Most modern spreadsheet software will warn users and require confirmation before running potentially risky formulas, however this is still considered a risk as users may still accept the warning. Severity/Risk: Serious Versions affected: 5.1, 5.0 to 5.0.3, 4.5 to 4.5.7, 4.4 to 4.4.11, 4.1 to 4.1.21 and earlier unsupported versions Versions fixed: 5.1.1, 5.0.4, 4.5.8, 4.4.12 and 4.1.22 Reported by: Brendan Heywood CVE identifier: CVE-2025-67851 Changes (main): http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-72744 Tracker issue: MDL-72744 Formula injection risk when exporting data to CSV / Excel