CVE-2020-11890 Missing authorization in n/a
Improper input validation in Joomla's usergroup table class allows attackers to bypass Access Control List restrictions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-11890?
CVE-2020-11890 is a medium-severity missing authorization vulnerability in Joomla Joomla\!, published on 21 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2020-11890?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 2.5.0 | 3.9.17 |
Products include Joomla Joomla\!.
How do I fix CVE-2020-11890?
Upgrade joomla to 3.9.17 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2020-11890 being exploited?
There is no known exploitation of CVE-2020-11890 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Joomla Joomla\!
- CVE-2016-10033 PHPMailer Command Injection
- CVE-2023-23752 Joomla! Improper Access Control
- CVE-2026-48902 Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links
- CVE-2025-25226 [20250401] - Joomla Framework - SQL injection vulnerability in quoteNameStr method of Database package
- CVE-2022-23795 [20220303] - Core - User row are not bound to a authentication mechanism
Sources
Also known as BIT-joomla-2020-11890, GHSA-gqjv-9xmw-cfqh.