CVE-2021-47919 Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter
Attackers can inject malicious scripts via the preview parameter to hijack user sessions or perform phishing attacks in Simple CMS.
- 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-2021-47919?
CVE-2021-47919 is a medium-severity cross-site scripting vulnerability in Simplephpscripts Simple CMS, published on 1 Feb 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
Simple CMS 2.1 contains a non-persistent cross-site scripting vulnerability in the preview.php file's id parameter. Attackers can inject malicious script code through a GET request to execute arbitrary scripts and potentially hijack user sessions or perform phishing attacks.
Weakness: CWE-79
Which versions are affected by CVE-2021-47919?
It affects 1 product.
Products include Simplephpscripts Simple Cms Php.
How do I fix CVE-2021-47919?
No fix has been published for CVE-2021-47919 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-2021-47919 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47919 exists.
Other vulnerabilities in Simplephpscripts Simple CMS
Sources
Also known as GHSA-p3gm-qv6r-wh7x.