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CVE-2025-67853 — Vulnerability in moodle/moodle — CVE Details

HIGH

Moodle Affected by Improper Restriction of Excessive Authentication Attempts

Published February 3, 2026Updated February 22, 2026Source: osv

Summary

A flaw was found in Moodle. A remote attacker could exploit a lack of proper rate limiting in the confirmation email service. This vulnerability allows attackers to more easily enumerate or guess user credentials, facilitating brute-force attacks against user accounts.

Advisory Timeline

  • First published February 3, 2026 (251 days ago).
  • Last revised February 22, 2026 — 19 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer
Update moodle/moodle to 5.1.1 or later
composer require "moodle/moodle:^5.1.1"
Composer
Update moodle/moodle to 4.4.12 or later
composer require "moodle/moodle:^4.4.12"
Composer
Update moodle/moodle to 4.5.8 or later
composer require "moodle/moodle:^4.5.8"
Composer
Update moodle/moodle to 4.1.22 or later
composer require "moodle/moodle:^4.1.22"
Composer
Update moodle/moodle to 5.0.4 or later
composer require "moodle/moodle:^5.0.4"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (5)

Affects 1 ecosystem: packagist (1).

PackageEcosystemAffectedFixed In
moodle/moodle
packagist
v5.1.0, v5.1.0-beta, v5.1.0-rc1, v5.1.0-rc25.1.1
moodle/moodle
packagist
v4.4.0, v4.4.0-beta, v4.4.0-rc1, v4.4.0-rc2 (+11 more)4.4.12
moodle/moodle
packagist
v4.5.0, v4.5.0-beta, v4.5.0-rc1, v4.5.0-rc2 (+7 more)4.5.8
moodle/moodle
packagist
v2.3.10, v2.3.11, v2.3.4, v2.3.5 (+350 more)4.1.22
moodle/moodle
packagist
v5.0.0, v5.0.0-beta, v5.0.0-rc1, v5.0.0-rc2 (+4 more)5.0.4

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2025-67853?
Moodle Affected by Improper Restriction of Excessive Authentication Attempts This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2025-67853?
CVE-2025-67853 affects moodle/moodle. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-67853 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-5cx4-w4fh-fr57
BIT-moodle-2025-67853

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