nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2021-47735 CVE-2021-47735
HIGH
CMSimple 5.4 Authenticated Remote Code Execution via Template Editing
Record summary
CVE-2021-47735 has a selected CVSS score of 8.6 (high); EIP currently links 1 catalogued exploit.
Description
CMSimple 5.4 contains an authenticated remote code execution vulnerability that allows logged-in attackers to inject malicious PHP code into template files. Attackers can exploit the template editing functionality by crafting a reverse shell payload and saving it through the template editing endpoint with a valid CSRF token.
Description source: CVE List
Exploitation context
Available material
- Catalogued exploits
- 1
CISA SSVC decision
ExploitationPoC
AutomatableNo
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Dec 23, 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 - Remote Code Execution (RCE) (Authenticated)ExploitDB exploitby pussycat0xNot analyzed1 file
References
4Official CMSimple Homepageproduct
https://www.cmsimple.org/ ExploitDB-50356exploit
https://www.exploit-db.com/exploits/50356 VulnCheck Advisory: CMSimple 5.4 Authenticated Remote Code Execution via Template EditingThird-party advisory
https://www.vulncheck.com/advisories/cmsimple-authenticated-remote-code-execution-via-template-editing