nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2021-47733 CVE-2021-47733
MEDIUM
CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding
Record summary
CVE-2021-47733 has a selected CVSS score of 5.1 (medium); EIP currently links 1 catalogued exploit.
Description
CMSimple 5.4 contains a cross-site scripting vulnerability that allows attackers to bypass input filtering by using HTML to Unicode encoding. Attackers can inject malicious scripts by encoding payloads like ')-alert(1)// and execute arbitrary JavaScript when victims interact with delete buttons.
Description source: CVE List
Exploitation context
Available material
- Catalogued exploits
- 1
CISA SSVC decision
ExploitationPoC
AutomatableNo
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Dec 26, 2025 · Source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
CMSimpleBrowse Cmsimple / CMSimple | CVE List | <=5.4 | affected |
Proofs of concept
1Catalogued exploits
ExploitDBCMSimple 5.4 - Cross Site Scripting (XSS)ExploitDB exploitby heinjameNot analyzed1 file
References
4CMSimple Official Homepageproduct
https://www.cmsimple.org/en ExploitDB-50612exploit
https://www.exploit-db.com/exploits/50612 VulnCheck Advisory: CMSimple 5.4 Cross-Site Scripting via HTML Unicode EncodingThird-party advisory
https://www.vulncheck.com/advisories/cmsimple-cross-site-scripting-via-html-unicode-encoding