Authentication Flaw in Open-WebUI Affects Performance
CVE-2024-12537

7.5HIGH

Key Information:

Vendor

Open-webui

Status
Open-webui/open-webui
Vendor
CVE Published:
20 March 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2024-12537?

In version 0.3.32 of Open-WebUI, a critical security flaw exists due to the lack of authentication mechanisms. This vulnerability allows any unauthenticated attacker to send requests to the api/v1/utils/code/format endpoint. By submitting a POST request containing an excessively high volume of content, an attacker can overwhelm the server, leading to severe performance issues. This behavior may result in the server becoming unresponsive, significantly degrading performance, and causing prolonged service interruptions for legitimate users.

Affected Version(s)

open-webui/open-webui <= unspecified

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.

POC_CVE-2024-12537
Created by fineman999

References

https://huntr.com/bounties/edabd06c-acc0-428c-a481-271f33...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

CVSS V3.0

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.