What is CVE-2025-67851?

CVE-2025-67851 is a medium-severity vulnerability in Moodle, classified under Improper Neutralization of Formula Elements in a CSV File. CVSS score: 6.1/10. Published 2026-02-03.

How severe is CVE-2025-67851?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Moodle

CVE-2025-67851

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.

EPSS: 0.003 (16.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:L.

Affected products

Moodle — versions 5.1.0

Weakness classification (CWE)

CWE-1236 — Improper Neutralization of Formula Elements in a CSV File

References

patrick@puiterwijk.org (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
patrick@puiterwijk.org (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
patrick@puiterwijk.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-67851?: CVE-2025-67851 is a medium-severity vulnerability in Moodle, classified under Improper Neutralization of Formula Elements in a CSV File. CVSS score: 6.1/10. Published 2026-02-03.
How severe is CVE-2025-67851?: Medium severity. CVSS v3 base score is 6.1 out of 10.