Unauthenticated Remote Code Execution in Hyland OnBase Product
CVE-2025-34153

10CRITICAL

Key Information:

Vendor

Hyland Software

Status
Onbase
Vendor
CVE Published:
13 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-34153?

Hyland OnBase, specifically versions prior to 17.0.2.87, is susceptible to a vulnerability allowing unauthenticated remote code execution through insecure deserialization on its .NET Remoting TCP channel. The impacted service listens on TCP port 6031 and utilizes the URI endpoint TimerServer, implemented within the Hyland.Core.Timers.dll. This endpoint processes untrusted input via the .NET BinaryFormatter, which can be exploited by attackers to execute arbitrary code with the privileges of NT AUTHORITY\SYSTEM, potentially leading to severe security breaches.

Affected Version(s)

OnBase * < 17.0.2.87

OnBase 24.1

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-2025-34153 - Proof of Concept

References

https://gist.github.com/VAMorales/32794cccc2195a935623a12...
technical-descriptionexploit
https://www.hyland.com/en/internal/onbase-unity-client
product
https://support.hyland.com/r/OnBase/WorkView/Foundation-2...
patch

CVSS V4

Score:
10
Severity:
CRITICAL
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

Victor Morales of GM Sectec
.
CVE-2025-34153 : Unauthenticated Remote Code Execution in Hyland OnBase Product