Unquoted Service Path Vulnerability in Outline by Outline
CVE-2023-54331

8.5HIGH

Key Information:

Vendor

Getoutline

Status
Outline
Vendor
CVE Published:
13 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-54331?

Outline version 1.6.0 is affected by an unquoted service path vulnerability that enables local attackers to execute arbitrary code with elevated system privileges. By exploiting the unquoted service path in the OutlineService executable, malicious actors can inject harmful code that runs under LocalSystem permissions, potentially compromising system security and stability.

Affected Version(s)

Outline 1.6.0

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-2023-54331 - Proof of Concept

References

https://www.exploit-db.com/exploits/51128
exploit
https://getoutline.org/
product
https://www.vulncheck.com/advisories/outline-unquoted-ser...
third-party-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
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

Milad Karimi (Ex3ptionaL)
.