What’s Vulnerable › Vulnerabilities

CVE-2020-11890

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-21 · updated 2026-06-17
• Weakness: CWE-20

Description

An issue was discovered in Joomla! before 3.9.17. Improper input validations in the usergroup table class could lead to a broken ACL configuration.

Affected products

• Joomla!: from 2.5.0 before 3.9.17 — fixed in 3.9.17

How to fix

Upgrade to a fixed version: Joomla! 3.9.17. Check the vendor advisory for mitigations.

References

• https://developer.joomla.org/security-centre/810-20200402-core-missing-checks-for-the-root-usergroup-in-usergroup-table.html
• https://developer.joomla.org/security-centre/810-20200402-core-missing-checks-for-the-root-usergroup-in-usergroup-table.html

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