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Fencer Vulns
high 7.5

CVE-2025-67853 json

Moodle: moodle: brute-force facilitation due to missing rate limiting in confirmation email service

published 2026-02-03 9 mo ago modified 2026-09-08 2 mo ago also BIT-moodle-2025-67853 , EUVD-2025-206748 , GHSA-5cx4-w4fh-fr57

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

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.

Patch / fix

  • packagist moodle/moodle 4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1
  • bitnami moodle 4.1.22, 4.4.11, 4.5.8, 5.0.4, 5.1.1
  • moodle moodle 4.1.22, 4.4.11, 4.5.8, 5.0.4

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-67853 updated cvss 7.5

moodle: Moodle: Brute-force facilitation due to missing rate limiting in confirmation email service

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
<4.1.22
>=4.4.0-beta, <4.4.12
>=4.5.0-beta, <4.5.8
>=5.0.0-beta, <5.0.4
>=5.1.0-beta, <5.1.1
4.1.22
4.4.12
4.5.8
5.0.4
5.1.1
bitnami moodle
<4.1.22
>=4.4.0, <4.4.11
>=4.5.0, <4.5.8
>=5.0.0, <5.0.4
>=5.1.0, <5.1.1
4.1.22
4.4.11
4.5.8
5.0.4
5.1.1

Classification

Weakness
  • CWE-307 Improper Restriction of Excessive Authentication Attempts

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.