Remote Code Execution Vulnerability in TextPattern CMS 4.8.7
CVE-2021-47943

8.7HIGH

Key Information:

Vendor

Textpattern

Status
Textpattern Cms
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47943?

TextPattern CMS 4.8.7 has a significant flaw that allows authenticated users to upload malicious PHP files through a file upload feature. This vulnerability enables attackers to execute arbitrary commands on the server by leveraging the content management system's file handling capabilities. By uploading a malicious PHP shell via the Files section, attackers can gain unauthorized access and manipulate the server. This security concern underscores the importance of safeguarding upload functionalities in web applications to prevent exploitation.

Affected Version(s)

TextPattern CMS 4.8.7

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-2021-47943 - Proof of Concept

CVE-2021-47943 - Proof of Concept

References

https://www.exploit-db.com/exploits/49996
exploit
https://www.exploit-db.com/exploits/50415
exploit
https://www.vulncheck.com/advisories/textpattern-cms-remo...
third-party-advisory

CVSS V4

Score:
8.7
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

Mert Daş merterpreter@gmail.com
.