Command Injection Vulnerability in LiteSpeed Web Server Enterprise
CVE-2021-47903

8.6HIGH

Key Information:

Vendor

Litespeed Technologies Inc

Status
Litespeed Web Server Enterprise
Vendor
CVE Published:
23 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47903?

LiteSpeed Web Server Enterprise 5.4.11 is susceptible to an authenticated command injection flaw. This vulnerability allows authenticated administrators to execute arbitrary shell commands through the 'Command' parameter in the server's external app configuration interface. By exploiting this vulnerability, attackers can potentially perform remote code execution, leveraging path traversal techniques and bash command injection to compromise the server's integrity.

Affected Version(s)

LiteSpeed Web Server Enterprise 5.4.11

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-2021-47903 - Proof of Concept

References

https://www.exploit-db.com/exploits/49523
exploit
https://www.litespeedtech.com/
product
https://www.litespeedtech.com/products
product

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

cmOs - SunCSR
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