Authenticated Remote Code Execution Vulnerability in CMSimple_XH by CMSimple
CVE-2021-47736

8.6HIGH

Key Information:

Vendor

Cmsimple-xh

Status
Cmsimple Xh
Vendor
CVE Published:
23 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47736?

CMSimple_XH version 1.7.4 is vulnerable to an authenticated remote code execution flaw that arises within its content editing feature. This vulnerability can be exploited by attackers possessing valid administrative credentials, allowing them to bypass security mechanisms, including CSRF token validation. By leveraging this exploit, attackers can upload malicious PHP files, granting them the ability to execute arbitrary commands on the server. This poses a significant risk to the integrity and confidentiality of affected installations.

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Affected Version(s)

CMSimple_XH 1.7.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47736 - Proof of Concept

References

https://www.exploit-db.com/exploits/50367
exploit
https://www.cmsimple-xh.org/
product
https://www.vulncheck.com/advisories/cmsimplexh-authentic...
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Halit AKAYDIN (hLtAkydn)
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