RVC-Project Retrieval-based-Voice-Conversion-WebUI up to 2.2.231006 vr.py uvr model_choose deserialization

Summaryinfo

A vulnerability, which was classified as very critical, has been found in RVC-Project Retrieval-based-Voice-Conversion-WebUI up to 2.2.231006. This vulnerability affects the function uvr of the file vr.py. Performing a manipulation of the argument model_choose results in deserialization. This vulnerability is reported as CVE-2025-43852. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, was found in RVC-Project Retrieval-based-Voice-Conversion-WebUI up to 2.2.231006. This affects the function uvr of the file vr.py. The manipulation of the argument model_choose with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 , if model_name contains the string "DeEcho", a new instance of AudioPreDeEcho class is created with the model_path attribute containing the aforementioned user input. In the AudioPreDeEcho 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.

The advisory is shared at securitylab.github.com. This vulnerability is uniquely identified as CVE-2025-43852 since 04/17/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/01/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Project Management Software

Vendor

• RVC-Project

Name

• Retrieval-based-Voice-Conversion-WebUI

Version

• 2.2.231006

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion