CVE-2020-10240 Business logic in n/a
Attackers can create duplicate user accounts due to missing validation, compromising data integrity in Joomla installations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-10240?
CVE-2020-10240 is a medium-severity vulnerability in Joomla Joomla\!, published on 16 Mar 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 3.9.16. Missing length checks in the user table can lead to the creation of users with duplicate usernames and/or email addresses.
Weakness: CWE-20
Which versions are affected by CVE-2020-10240?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 3.0.0 | 3.9.16 |
Products include Joomla Joomla\!.
How do I fix CVE-2020-10240?
Upgrade joomla to 3.9.16 or later.
Is CVE-2020-10240 being exploited?
There is no known exploitation of CVE-2020-10240 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-2020-10240, GHSA-234w-59xq-xhfv.