All vulnerabilities

Servers and applications

CVE-2020-8421

An issue was discovered in Joomla! before 3.9.15. Inadequate escaping of usernames allows XSS attacks in com_actionlogs.

Severity
Medium 6.1
Published
28 Jan 2020
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.9.14
Sources
NVD

Affected software

SoftwareAffected versions
Joomla!Servers and applications · cpe:a:joomla:joomla\!
  • From 3.9.0 before 3.9.14

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-8421
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-8421