Description

Joomla! Core is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to bypass intended access restrictions and perform otherwise restricted actions. 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/859-20210704-core-privilege-escalation-through-com-installer.html

Related Vulnerabilities

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WordPress Plugin WP Job Manager Cross-Site Scripting (1.26.1)

WordPress Plugin Search Everything SQL Injection (7.0.2)

Undertow Exposure of Resource to Wrong Sphere Vulnerability (CVE-2021-3859)

Squid Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability (CVE-2005-0211)

Severity

High

Classification

CVE-2021-26038 CWE-284 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Tags

Missing Update Authentication Bypass