High severity · published Feb 3, 2026
CVE-2025-67853
Moodle: moodle: brute-force facilitation due to missing rate limiting in confirmation email service
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Moodle · Moodle
before 4.1.22; 4.4.0 before 4.4.11; 4.5.0 before 4.5.8; 5.0.0 before 5.0.4; 5.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-67853
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-67853
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-67853
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2423847
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