CVE-2026-21623 Extension - stackideas.com - Persistent XSS in EasyDiscuss component 1.0.0-5.0.15 for Joomla
Persistent XSS in EasyDiscuss allows attackers to inject scripts into forum posts, potentially compromising user sessions and data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21623?
CVE-2026-21623 is a critical cross-site scripting vulnerability in Stackideas.com EasyDiscuss extension for Joomla, published on 16 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Lack of input filterung leads to a persistent XSS vulnerability in the forum post handling of the Easy Discuss component for Joomla.
Weakness: CWE-79
Which versions are affected by CVE-2026-21623?
It affects 1 product.
Products include Stackideas Easydiscuss.
How do I fix CVE-2026-21623?
No fix has been published for CVE-2026-21623 yet. Limit exposure of the affected software until one is available.
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-2026-21623 being exploited?
There is no known exploitation of CVE-2026-21623 in the wild and no public exploit code.
Other vulnerabilities in Stackideas.com EasyDiscuss extension for Joomla
- CVE-2026-21624 Extension - stackideas.com - Persistent XSS in EasyDiscuss component 1.0.0-5.0.15 for Joomla
- CVE-2026-21626 Extension - stackideas.com - Information disclosure in post custom fields in EasyDiscuss 1.0.0-5.0.15 for Joomla
- CVE-2023-51810 SQL injection in n/a
- CVE-2018-5263 Cross-site scripting in n/a
- CVE-2026-21625 Extension - stackideas.com - Lack of mime type validation in EasyDiscuss component 1.0.0-5.0.15 for Joomla
Sources
Also known as GHSA-9h7p-fwvj-rw42.