CVE-2021-23123 [20210101] - Core - com_modules exposes module names
Attackers can view names of unpublished or inaccessible modules in Joomla due to missing ACL checks in the com_modules component.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-23123?
CVE-2021-23123 is a medium-severity vulnerability in Joomla Joomla\!, published on 12 Jan 2021. 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! 3.0.0 through 3.9.23. The lack of ACL checks in the orderPosition endpoint of com_modules leak names of unpublished and/or inaccessible modules.
Weakness: CWE-862
Which versions are affected by CVE-2021-23123?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 3.0.0 to 3.9.23 | None |
Products include Joomla Joomla\!.
How do I fix CVE-2021-23123?
No fix has been published for CVE-2021-23123 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-23123 being exploited?
There is no known exploitation of CVE-2021-23123 in the wild and no public exploit code.
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-2021-23123, GHSA-vrjw-8hw2-rwm5.