What is CVE-2025-62399?

CVE-2025-62399 is a high-severity vulnerability in Moodle, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.5/10. Published 2025-10-23.

How severe is CVE-2025-62399?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Moodle

CVE-2025-62399

Moodle’s mobile and web service authentication endpoints did not sufficiently restrict repeated password attempts, making them susceptible to brute-force attacks.

Published 2025-10-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Moodle

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

access.redhat.com/security/cve/CVE-2025-62399 (Third Party Advisory, vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2025-62399?: CVE-2025-62399 is a high-severity vulnerability in Moodle, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.5/10. Published 2025-10-23.
How severe is CVE-2025-62399?: High severity. CVSS v3 base score is 7.5 out of 10.