What’s Vulnerable › Vulnerabilities

CVE-2021-26038: [20210704] - Core - Privilege escalation through com_installer

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-07 · updated 2026-06-17
• Weakness: CWE-754

Description

An issue was discovered in Joomla! 2.5.0 through 3.9.27. Install action in com_installer lack the required hardcoded ACL checks for superusers. A default system is not affected cause the default ACL for com_installer is limited to super users already.

Affected products

• Joomla!: from 2.5.0 through 3.9.27

References

• https://developer.joomla.org/security-centre/859-20210704-core-privilege-escalation-through-com-installer.html
• https://developer.joomla.org/security-centre/859-20210704-core-privilege-escalation-through-com-installer.html

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