CVE-2021-47919
Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter
- State
- Published
- Severity
- 5.1 Medium
- Published
- Feb 1, 2026
- Updated
- Mar 5, 2026
- Reserved
- Feb 1, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Simple CMSSimplephpscripts |
|
References
- Vulnerability Lab Advisoryexploit
- Product Homepageproduct
- VulnCheck Advisory: Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameterthird-party-advisory
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