CVE-2021-47917
Simple CMS 2.1 Persistent Cross-Site Scripting via User Input Parameters
- 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 persistent cross-site scripting vulnerability in user input parameters that allows remote attackers to inject malicious script code. Attackers can exploit the newUser and editUser modules to inject persistent scripts that execute on user list preview, potentially leading to session hijacking and application manipulation.
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 Persistent Cross-Site Scripting via User Input Parametersthird-party-advisory
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