CVE-2020-13763 Cross-site scripting in n/a
Joomla's default text filter settings allow Guest users to inject HTML, potentially leading to Cross-Site Scripting attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-13763?
CVE-2020-13763 is a high-severity cross-site scripting vulnerability in Joomla Joomla\!, published on 2 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Joomla! before 3.9.19, the default settings of the global textfilter configuration do not block HTML inputs for Guest users.
Weakness: CWE-281
Which versions are affected by CVE-2020-13763?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 2.5.0 | 3.9.19 |
Products include Joomla Joomla\!.
How do I fix CVE-2020-13763?
Upgrade joomla to 3.9.19 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-13763 being exploited?
There is no known exploitation of CVE-2020-13763 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-2020-13763, GHSA-mjmf-xmqr-52w8.