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Fencer Vulns
medium 6.1

CVE-2021-32478 json

Moodle reflected XSS

published 2022-03-11 4 y ago modified 2026-09-08 2 mo ago also BIT-moodle-2021-32478 , EUVD-2022-1356 , GHSA-78fm-qhh8-8858

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known, plus a Nuclei check

Summary

The redirect URI in the LTI authorization endpoint required extra sanitizing to prevent reflected XSS and open redirect risks. Moodle versions 3.10 to 3.10.3, 3.9 to 3.9.6, 3.8 to 3.8.8 and earlier unsupported versions are affected.

Patch / fix

  • packagist moodle/moodle 3.8.9, 3.9.7, 3.10.4
  • bitnami moodle 3.8.9, 3.9.7, 3.10.4
  • moodle moodle 3.8.9, 3.9.7, 3.10.4

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-2021-32478 updated cvss 6.1

moodle: Moodle: Reflected XSS and Open Redirect

  • 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

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Moodle 3.8-3.10.3 - Reflected XSS & Open Redirect nuclei detection template

CVSS scores

assigned by version score vector
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
OSV 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
>=3.10, <3.10.4
>=3.9, <3.9.7
>=3.8, <3.8.9
3.10.4
3.9.7
3.8.9
bitnami moodle
<3.8.9
>=3.9.0, <3.9.7
>=3.10.0, <3.10.4
3.8.9
3.9.7
3.10.4

Affected products

  • n/a moodle

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
  • CWE-601 URL Redirection to Untrusted Site

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.