PT-2026-21017 · Joomla+1 · Joomla!+1

Published 2026-02-20 · Updated 2026-04-12 · CVE-2026-21627

Positive Technologies (AI Summary)

CVSS v4.0

9.5

Critical

Base vector

AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Name of the Vulnerable Software and Affected Versions Joomla (affected versions not specified)

Description The issue stemmed from how the Tassos Framework plugin processed certain AJAX requests via Joomla’s com ajax entry point. In specific scenarios, internal framework functionality was accessible without appropriate limitations. The vulnerable entry point is /com ajax.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-21627

Affected Products

Joomla!

Tassos Framework

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-21627 · Security Note
• https://tassos.gr · Note
• https://twitter.com/CVEnew/status/2025809077671166297 · Twitter Post
• https://twitter.com/mysitesguru/status/2038700800537452948 · Twitter Post
• https://twitter.com/mysitesguru/status/2043290584840892479 · Twitter Post