XSS in Moodle

CVE-2020-25631

A vulnerability was found in Moodle 3.9 to 3.9.1, 3.8 to 3.8.4 and 3.7 to 3.7.7 where it was possible to include JavaScript in a book's chapter title, which was not escaped on the "Add new chapter" page. This is fixed in 3.9.2, 3.8.5 and 3.7.8.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.009 (56.7th 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
  • N/a Moodle — versions 3.9 to 3.9.1, 3.8 to 3.8.4 and 3.7 to 3.7.7

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-25631?
CVE-2020-25631 is a medium-severity vulnerability in Moodle, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-12-08.
How severe is CVE-2020-25631?
Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-25631 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.