All vulnerabilities

Servers and applications

CVE-2023-23921

The vulnerability was found Moodle which exists due to insufficient sanitization of user-supplied data in some returnurl parameters. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website. This flaw allows a remote attacker to perform cross-site scripting (XSS) attacks.

Severity
Medium 6.1
Published
17 Feb 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.9.19, 3.11.12, 4.0.6
Sources
NVD

Affected software

SoftwareAffected versions
MoodleServers and applications · cpe:a:moodle:moodle
  • From 3.9.0 before 3.9.19
  • From 3.11.0 before 3.11.12
  • From 4.0.0 before 4.0.6
  • Version 4.1.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-23921
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-23921