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Fencer Vulns
critical 9.8

CVE-2023-28333 json

Moodle: pix helper potential mustache code injection risk

published 2023-03-23 3 y ago modified 2026-09-08 2 mo ago also BIT-moodle-2023-28333 , EUVD-2023-1076 , GHSA-q2x3-2f9g-h559

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

The Mustache pix helper contained a potential Mustache injection risk if combined with user input (note: This did not appear to be implemented/exploitable anywhere in the core Moodle LMS).

Patch / fix

  • packagist moodle/moodle 3.9.20, 3.11.13, 4.0.7, 4.1.2
  • bitnami moodle 3.9.20, 3.11.13, 4.0.7, 4.1.2
  • moodle moodle 3.9.20, 3.11.13, 4.0.7

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-2023-28333 updated

moodle: Pix helper potential Mustache code injection risk

  • 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
total
Assessed
2 y ago

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
>=4.1.0, <4.1.2
>=4.0.0, <4.0.7
>=3.11.0, <3.11.13
<3.9.20
4.1.2
4.0.7
3.11.13
3.9.20
bitnami moodle
>=3.9.0, <3.9.20
>=3.11.0, <3.11.13
>=4.0.0, <4.0.7
>=4.1.0, <4.1.2
3.9.20
3.11.13
4.0.7
4.1.2

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

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.