CVE-2021-47733
MEDIUM EPSS 12.0%
Published Dec 23, 20256mo ago · Modified Jun 17, 20261w ago
5.1 CVSS 4.0
Published Dec 23, 2025 6mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction P
Scope X
Threat Intelligence
EPSS Exploit Probability
12.0% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available
Weaknesses 1
CWE-79 Cross-site Scripting Injection
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| cmsimple | cmsimple | 5.4 | any |
References 3
- cmsimple.org https://www.cmsimple.org/en/
- exploit-db.com https://www.exploit-db.com/exploits/50612
- vulncheck.com https://www.vulncheck.com/advisories/cmsimple-cross-site-scripting-via-html-unicode-encoding
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.