Vulnerability DatabaseCVE-2025-67853
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CVE-2025-67853
Published:February 03, 2026
Updated:May 16, 2026
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.
Affected Packages
https://github.com/moodle/moodle.git (GITHUB):
Affected version(s) >=v4.4.0 <v4.4.12
Fix Suggestion:
Update to version v4.4.12
https://github.com/moodle/moodle.git (GITHUB):
Affected version(s) =v5.1.0 <v5.1.1
Fix Suggestion:
Update to version v5.1.1
https://github.com/moodle/moodle.git (GITHUB):
Affected version(s) >=v4.1.0 <v4.1.22
Fix Suggestion:
Update to version v4.1.22
https://github.com/moodle/moodle.git (GITHUB):
Affected version(s) >=v4.5.0 <v4.5.8
Fix Suggestion:
Update to version v4.5.8
https://github.com/moodle/moodle.git (GITHUB):
Affected version(s) >=v5.0.0 <v5.0.4
Fix Suggestion:
Update to version v5.0.4
moodle/moodle (PHP):
Affected version(s) >=v5.0.0 <v5.0.4
Fix Suggestion:
Update to version v5.0.4
moodle/moodle (PHP):
Affected version(s) >=v5.0.0-beta <v5.0.4
Fix Suggestion:
Update to version v5.0.4
moodle/moodle (PHP):
Affected version(s) >=v1.0.0 <v4.1.22
Fix Suggestion:
Update to version v4.1.22
moodle/moodle (PHP):
Affected version(s) >=v5.1.0-beta <v5.1.1
Fix Suggestion:
Update to version v5.1.1
moodle/moodle (PHP):
Affected version(s) >=v4.4.0-beta <v4.4.12
Fix Suggestion:
Update to version v4.4.12
moodle/moodle (PHP):
Affected version(s) =v5.1.0 <v5.1.1
Fix Suggestion:
Update to version v5.1.1
moodle/moodle (PHP):
Affected version(s) >=v4.5.0-beta <v4.5.8
Fix Suggestion:
Update to version v4.5.8
moodle/moodle (PHP):
Affected version(s) >=v4.5.0 <v4.5.8
Fix Suggestion:
Update to version v4.5.8
moodle/moodle (PHP):
Affected version(s) >=v4.4.0 <v4.4.12
Fix Suggestion:
Update to version v4.4.12
Related Resources (5)
https://nvd.nist.gov/vuln/detail/CVE-2025-67853
https://github.com/moodle/moodle
https://access.redhat.com/security/cve/CVE-2025-67853
https://moodle.org/mod/forum/discuss.php?d=471303
https://bugzilla.redhat.com/show_bug.cgi?id=2423847
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Restriction of Excessive Authentication Attempts
CWE-307
EPSS
Base Score:
0.03