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Fencer Vulns
medium 5.4

CVE-2024-45691 json

Moodle: lesson activity password bypass through php loose comparison

published 2024-11-20 23 mo ago modified 2026-09-08 2 mo ago also BIT-moodle-2024-45691 , EUVD-2024-3390 , GHSA-xfv7-h2qg-rjm7

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

A flaw was found in Moodle. When restricting access to a lesson activity with a password, certain passwords could be bypassed or less secure due to a loose comparison in the password-checking logic. This issue only affected passwords set to "magic hash" values.

Patch / fix

  • packagist moodle/moodle 4.1.13, 4.2.10, 4.3.7, 4.4.3
  • bitnami moodle 4.1.13, 4.2.10, 4.3.7, 4.4.3
  • moodle moodle 4.1.13, 4.2.10, 4.3.7, 4.4.3

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-2024-45691 updated cvss 9.8

moodle: Lesson activity password bypass through PHP loose comparison

  • 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
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
<4.1.13
>=4.2.0-beta, <4.2.10
>=4.3.0-beta, <4.3.7
>=4.4.0-beta, <4.4.3
4.1.13
4.2.10
4.3.7
4.4.3
bitnami moodle
<4.1.13
>=4.2.0, <4.2.10
>=4.3.0, <4.3.7
>=4.4.0, <4.4.3
4.1.13
4.2.10
4.3.7
4.4.3

Classification

Weakness
  • CWE-285 Improper Authorization
  • CWE-289 Authentication Bypass by Alternate Name

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.