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CVE-2025-43851 GHSL-2025-021_Retrieval-based-Voice-Conversion-WebUI

High 8.9 Published Updated

Attackers can achieve remote code execution via unsafe deserialization in the model loading process of the voice conversion framework.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2025-43851?

CVE-2025-43851 is a high-severity unsafe deserialization vulnerability in RVC-Project Retrieval-based-Voice-Conversion-WebUI, published on 5 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Retrieval-based-Voice-Conversion-WebUI is a voice changing framework based on VITS. Versions 2.2.231006 and prior are vulnerable to unsafe deserialization. The model_choose variable takes user input (e.g. a path to a model) and passes it to the uvr function in vr.py. In uvr , a new instance of AudioPre class is created with the model_path attribute containing the aformentioned user input. In the AudioPre class, the user input, is used to load the model on that path with torch.load, which can lead to unsafe deserialization and remote code execution. As of time of publication, no known patches exist.

Weakness: CWE-502

Which versions are affected by CVE-2025-43851?

It affects 1 product.

Products include Rvc-Project Retrieval-Based-Voice-Conversion-Webui.

How do I fix CVE-2025-43851?

No fix has been published for CVE-2025-43851 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2025-43851 being exploited?

There is no known exploitation of CVE-2025-43851 in the wild and no public exploit code.

Sources

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