CVE-2021-47919 | THREATINT

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.

PUBLISHED Reserved 2026-02-01 | Published 2026-02-01 | Updated 2026-02-02 | Assigner VulnCheck

MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status

unaffected

2.1

affected

Credits

Vulnerability-Lab [Research Team] finder

References

www.vulnerability-lab.com/get_content.php?id=2301 (Vulnerability Lab Advisory) exploit

simplephpscripts.com/simple-cms-php (Product Homepage) product

www.vulncheck.com/...ss-site-scripting-via-preview-parameter (VulnCheck Advisory: Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter) third-party-advisory

cve.org (CVE-2021-47919)

nvd.nist.gov (CVE-2021-47919)

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