PT-2020-20125 · Joomla · Joomla!

Lee Thao · Published 2020-01-28 · Updated 2025-04-03 · CVE-2020-8420

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Joomla! versions prior to 3.9.15

Description A missing CSRF token check in the LESS compiler of com templates causes a CSRF issue. This allows for potential exploitation.

Recommendations For versions prior to 3.9.15, update to version 3.9.15 or later to resolve the issue. As a temporary workaround, consider restricting access to the com templates component until a patch is applied.

Fix

CSRF

Weakness Enumeration

CWE-352

Related Identifiers

BIT-JOOMLA-2020-8420

CVE-2020-8420

Affected Products

Joomla!

References · 5

• https://developer.joomla.org/security-centre/799-20200102-core-csrf-com-templates-less-compiler · Vendor Advisory
• https://osv.dev/vulnerability/BIT-joomla-2020-8420 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8420 · Security Note
• https://osv.dev/vulnerability/CVE-2020-8420 · Vendor Advisory
• https://t.me/cvenotify/574 · Telegram Post