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Fencer Vulns
medium 6.5

CVE-2023-5544 json

Moodle: stored xss and potential idor risk in wiki comments

published 2023-11-09 2 y ago modified 2026-09-10 1 mo ago also BIT-moodle-2023-5544 , EUVD-2023-2983 , GHSA-j5xf-gv89-g422

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

Wiki comments required additional sanitizing and access restrictions to prevent a stored XSS risk and potential IDOR risk.

Patch / fix

  • packagist moodle/moodle 4.3.0-rc2
  • bitnami moodle 3.9.24, 3.11.17, 4.0.11, 4.1.6, 4.2.3
  • moodle moodle 3.9.24, 3.11.17, 4.0.11, 4.1.6, 4.2.3

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-2023-5544 updated cvss 6.5

moodle: Stored XSS and potential IDOR risk in Wiki comments

  • 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

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/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:R/S:C/C:L/I:L/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
<4.3.0-rc2
4.3.0-rc2
bitnami moodle
>=3.9.0, <3.9.24
>=3.11.0, <3.11.17
>=4.0.0, <4.0.11
>=4.1.0, <4.1.6
>=4.2.0, <4.2.3
3.9.24
3.11.17
4.0.11
4.1.6
4.2.3

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
  • CWE-639 Authorization Bypass Through User-Controlled Key

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.