Remote Code Execution in e107 CMS by Unauthorized Theme Installation
CVE-2021-47937

8.7HIGH

Key Information:

Vendor

E107

Status
E107 Cms
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47937?

The e107 CMS version 2.3.0 is susceptible to a remote code execution vulnerability, granting authenticated users with theme installation permissions the ability to exploit the system. By uploading specially crafted theme files through the theme.php endpoint, attackers can deploy web shells in the e107_themes directory. These malicious files enable them to execute arbitrary system commands via a compromised payload.php script. This vulnerability poses significant risks to the integrity and security of affected installations.

Affected Version(s)

e107 CMS 2.3.0

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-2021-47937 - Proof of Concept

References

https://www.exploit-db.com/exploits/50315
exploit
https://e107.org/
product
https://e107.org/download
product

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

Halit AKAYDIN (hLtAkydn)
.