CVE-2025-67853
Moodle: moodle: brute-force facilitation due to missing rate limiting in confirmation email service
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Moodle: moodle: brute-force facilitation due to missing rate limiting in confirmation email service
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.
- Record
CVE-2025-67853- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-307
- Updated
- 2026-11-02
EUVDEUVD-2025-206748
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.
- Record
EUVD-2025-206748- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-5cx4-w4fh-fr57
Moodle Affected by Improper Restriction of Excessive Authentication Attempts
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.
- Record
GHSA-5cx4-w4fh-fr57- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-307
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-67853- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-307
- Updated
- 2026-11-02
OSV
Moodle: moodle: brute-force facilitation due to missing rate limiting in confirmation email service
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.
- Record
CVE-2025-67853- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-307
- Updated
- 2026-11-02
OSVGHSA-5cx4-w4fh-fr57
Moodle Affected by Improper Restriction of Excessive Authentication Attempts
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.
- Record
GHSA-5cx4-w4fh-fr57- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-307
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-67853
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.
- Record
UBUNTU-CVE-2025-67853- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVBIT-moodle-2025-67853 No score
Moodle: moodle: brute-force facilitation due to missing rate limiting in confirmation email service
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.
- Record
BIT-moodle-2025-67853- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moodle/moodlePackagist |
before 4.1.22 | 4.1.22 |
moodle/moodlePackagist |
4.4.0-beta up to 4.4.12 | 4.4.12 |
moodle/moodlePackagist |
4.5.0-beta up to 4.5.8 | 4.5.8 |
moodle/moodlePackagist |
5.0.0-beta up to 5.0.4 | 5.0.4 |
moodle/moodlePackagist |
5.1.0-beta up to 5.1.1 | 5.1.1 |
moodleBitnami |
before 4.1.22, 4.4.0 up to 4.4.11, 4.5.0 up to 4.5.8, 5.0.0 up to 5.0.4, 5.1.0 up to 5.1.1 | 4.1.224.4.114.5.85.0.45.1.1 |
moodle/moodlePackagist |
before 4.1.22, plus listed versions v2.3.10v2.3.11v2.3.4v2.3.5v2.3.6 Show 45 moreShow lessv2.3.7v2.3.8v2.3.9v2.4.0v2.4.0-rc1v2.4.1v2.4.10v2.4.11v2.4.2v2.4.3v2.4.4v2.4.5v2.4.6v2.4.7v2.4.8v2.4.9v2.5.0v2.5.0-betav2.5.0-rc1v2.5.1v2.5.2v2.5.3v2.5.4v2.5.5v2.5.6v2.5.7v2.5.8v2.5.9v2.6.0v2.6.0-betav2.6.0-rc1v2.6.1v2.6.10v2.6.11v2.6.2v2.6.3v2.6.4v2.6.5v2.6.6v2.6.7v2.6.8v2.6.9v2.7.0v2.7.0-betav2.7.0-rc1 |
4.1.22 |
moodle/moodlePackagist |
4.4.0-beta up to 4.4.12, plus listed versions v4.4.0v4.4.0-betav4.4.0-rc1v4.4.0-rc2v4.4.1 Show 10 moreShow lessv4.4.10v4.4.11v4.4.2v4.4.3v4.4.4v4.4.5v4.4.6v4.4.7v4.4.8v4.4.9 |
4.4.12 |
moodle/moodlePackagist |
4.5.0-beta up to 4.5.8, plus listed versions v4.5.0v4.5.0-betav4.5.0-rc1v4.5.0-rc2v4.5.1 Show 6 moreShow lessv4.5.2v4.5.3v4.5.4v4.5.5v4.5.6v4.5.7 |
4.5.8 |
moodle/moodlePackagist |
5.0.0-beta up to 5.0.4, plus listed versions v5.0.0v5.0.0-betav5.0.0-rc1v5.0.0-rc2v5.0.0-rc3v5.0.1v5.0.2v5.0.3 |
5.0.4 |
moodle/moodlePackagist |
5.1.0-beta up to 5.1.1, plus listed versions v5.1.0v5.1.0-betav5.1.0-rc1v5.1.0-rc2 |
5.1.1 |
moodleUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.7.9+dfsg-12.7.10+dfsg-12.7.11+dfsg-12.7.11+dfsg-22.7.12+dfsg-13.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1 |
None known |
moodleUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 3.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-67853 is a high vulnerability (CVSS 7.5) in Moodle, published February 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 40th percentile. Fixed in moodle/moodle 4.1.22.
References
access.redhat.com/security/cve/CVE-2025-67853
bugzilla.redhat.com/show_bug.cgi?id=2423847
nvd.nist.gov/vuln/detail/CVE-2025-67853
moodle.org/mod/forum/discuss.php?d=471303
github.com/advisories/GHSA-5cx4-w4fh-fr57
ubuntu.com/security/CVE-2025-67853
cve.org/CVERecord?id=CVE-2025-67853
Left out here: 304 versions. The JSON record has them.