XSS in Moodle

CVE-2020-14320

In Moodle before 3.9.1, 3.8.4 and 3.7.7, the filter in the admin task log required extra sanitizing to prevent a reflected XSS risk.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.006 (45.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Moodle — versions 3.9.0
N/a Moodle — versions Moodle 3.9, 3.8 to 3.8.3 and 3.7 to 3.7.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

secalert@redhat.com (Patch, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-14320?: CVE-2020-14320 is a medium-severity vulnerability in Moodle, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-08-16.
How severe is CVE-2020-14320?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-14320 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.