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

Magento CVE-2020-3718 Vulnerability (CVE-2020-3718)

Internet Information Services Other Vulnerability (CVE-2002-0148)

Joomla Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Vulnerability (CVE-2006-1049)

Joomla Other Vulnerability (CVE-2006-4473)

Gunicorn Improper Neutralization of CRLF Sequences ('CRLF Injection') Vulnerability (CVE-2018-1000164)

Severity

High

Classification

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 CWE-400 CVE-2021-26036