PT-2021-16929 · Joomla · Joomla!

Hoang Kien · Published 2021-07-07 · Updated 2025-04-03 · CVE-2021-26036

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Joomla! versions 2.5.0 through 3.9.27

Description An issue was discovered in Joomla! where missing validation of input could lead to a broken usergroups table.

Recommendations For Joomla! versions 2.5.0 through 3.9.27, update to a version that includes the necessary input validation to prevent the usergroups table from being broken.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BIT-JOOMLA-2021-26036

CVE-2021-26036

Affected Products

Joomla!

References · 5

• https://developer.joomla.org/security-centre/857-20210702-core-dos-through-usergroup-table-manipulation.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-26036 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26036 · Security Note
• https://osv.dev/vulnerability/BIT-joomla-2021-26036 · Vendor Advisory
• https://t.me/cvenotify/17200 · Telegram Post