XSS in Moodle

CVE-2023-5547

The course upload preview contained an XSS risk for users uploading unsafe data.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.005 (40.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Moodle
Fedoraproject Fedora — versions 37, 38, 39
Redhat Enterprise_linux — versions 7.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

jev770/badmoodle-scan

References

patrick@puiterwijk.org (Patch)
patrick@puiterwijk.org (x_refsource_REDHAT, issue-tracking, Issue Tracking)
patrick@puiterwijk.org (Patch)

Frequently asked questions

What is CVE-2023-5547?: CVE-2023-5547 is a low-severity vulnerability in Moodle, classified under Cross-site Scripting. CVSS score: 3.3/10. Published 2023-11-09.
How severe is CVE-2023-5547?: Low severity. CVSS v3 base score is 3.3 out of 10.
Is CVE-2023-5547 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.