Vulnerability · Published Feb 1, 2026 · Assigned by VulnCheck
CVE-2021-47919Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter
Medium 6.4
In plain English
A medium-severity cross-site scripting in Simple CMS from Simplephpscripts. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.3%top 74.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Simplephpscripts | Simple CMS | 2.1 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
References
- Vulnerability Lab Advisory exploit
- Product Homepage product
- VulnCheck Advisory: Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter third-party-advisory