XSS in Simplephpscripts Simple Cms
CVE-2021-47919
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Simplephpscripts Simple Cms — versions 2.1
- Simplephpscripts Simple Cms PHP — versions 2.1
Weakness classification (CWE)
References
- www.vulnerability-lab.com/get_content.php (Exploit, Third Party Advisory, exploit)
- simplephpscripts.com/simple-cms-php (Product, product)
- www.vulncheck.com/advisories/simple-cms-non-persistent-cross-site-scripting-via… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-47919?
- CVE-2021-47919 is a medium-severity vulnerability in Simplephpscripts Simple Cms, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-02-01.
- How severe is CVE-2021-47919?
- Medium severity. CVSS v3 base score is 6.4 out of 10.