Description

Joomla! Core is prone to a Denial of Service vulnerability. Exploiting this issue may allow an attacker to cause a broken usergroups table, thus denying service to legitimate users. Joomla! Core versions ranging from 2.5.0 and up to and including 3.9.27 are vulnerable.

Remediation

Update to Joomla! Core version 3.9.28 or latest

References

https://developer.joomla.org/security-centre/857-20210702-core-dos-through-usergroup-table-manipulation.html

Related Vulnerabilities

Internet Information Services Other Vulnerability (CVE-1999-1375)

Zope Web Application Server Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2023-42458)

phpMyAdmin 7PK - Security Features Vulnerability (CVE-2016-9850)

WordPress 4.6.x Cross-Site Request Forgery (4.6 - 4.6.13)

WordPress Plugin Magic Fields 2 Cross-Site Scripting (2.3.2.4)

Severity

High

Classification

CVE-2021-26036 CWE-400 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Tags

Missing Update Denial Of Service