CVE-2021-47919CWE-79

Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter

Medium · published February 1, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
25.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
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
EPSS
0.00333 · 25.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-01T12:15Z
EPSS history
Timeline
  • 01 FEB 12:15Z
    Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter
    cvelistv5