Remote Code Execution in ImpressCMS 1.4.2 by Authenticated Users
CVE-2021-47938

8.7HIGH

Key Information:

Vendor

Impresscms

Status
Impresscms
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47938?

ImpressCMS 1.4.2 has a vulnerability in the autotasks administrative interface that enables authenticated users to execute arbitrary PHP code. This is accomplished by injecting malicious code into the sat_code parameter. When attackers authenticate and send a POST request to /modules/system/admin.php?fct=autotasks&op=mod with a crafted sat_code containing PHP commands, it allows the creation of an executable file that can accept arbitrary commands via GET parameters, potentially compromising the integrity and security of the web application.

Affected Version(s)

ImpressCMS 1.4.2

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-2021-47938 - Proof of Concept

References

https://www.exploit-db.com/exploits/50298
exploit
https://www.impresscms.org/
product
https://www.impresscms.org/modules/downloads/
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)
.