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Retrieval Based Voice Conversion WebuiApplication · Rvc Project

CVE-2025-43844

CRITICAL · 9.8 CVSS v3.1 Published 2025-05-05
Fix available
A fix is available. Upgrade to after 2.2.231006 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Retrieval-based-Voice-Conversion-WebUI is a voice changing framework based on VITS. Versions 2.2.231006 and prior are vulnerable to command injection. The variables exp_dir1, among others, take user input and pass it to the click_train function, which concatenates them into a command that is run on the server. This can lead to arbitrary command execution. As of time of publication, no known patches exist.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Retrieval-based-Voice-Conversion-WebUI versions 2.2.231006 and prior contain a command injection vulnerability where user-controlled input (including exp_dir1) is concatenated directly into shell commands via the click_train function. An attacker can inject arbitrary OS commands by providing specially crafted input parameters, achieving unauthenticated remote code execution with critical severity.

MitigationImplement strict input validation and use parameterized command execution methods (e.g., subprocess with argument lists instead of shell=True, or shell escaping functions) for all user-supplied parameters before passing them to click_train. Network isolation and least-privilege service accounts provide additional defense-in-depth until a patch is available.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Retrieval Based Voice Conversion WebuiApplication
Affected:<= 2.2.231006

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the installed RVC WebUI version
    Locate the version file or check the source code for version information, typically found in the main application directory or a version config file
    Affected if The version is 2.2.231006 or any version prior to it (e.g., 2.2.x, 2.1.x, earlier releases)
  2. Verify the click_train function exists in the codebase
    Search the source code for the click_train function definition, particularly in files handling the training module
    Affected if The click_train function is present and processes user-supplied parameters including exp_dir1
  3. Determine if the web interface is network-accessible
    Check if the RVC WebUI application is running and exposed on a network-accessible interface (e.g., listening on 0.0.0.0 or external IP rather than localhost only)
    Affected if The web interface is accessible from untrusted networks without proper network isolation
  4. Inspect the click_train function for unsafe command construction
    Examine the click_train function source code for direct string concatenation of user inputs (particularly exp_dir1) into shell commands, look for patterns like subprocess calls with shell=True using f-strings or string formatting with user variables
    Affected if The code uses string concatenation or formatting to build shell commands from user inputs without sanitization or parameterized execution

You are affected if you are running RVC WebUI version 2.2.231006 or earlier, the web interface is network-accessible, and the click_train function contains direct shell command construction from user input without proper sanitization.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 2.2.231006
Interim mitigation

Implement strict input validation and use parameterized command execution methods (e.g., subprocess with argument lists instead of shell=True, or shell escaping functions) for all user-supplied parameters before passing them to click_train. Network isolation and least-privilege service accounts provide additional defense-in-depth until a patch is available.

Recommended fix High confidence
  1. Do not expose this application to untrusted networks or the internet until a security patch is released
  2. If the application must be used, implement network-level segmentation and strict firewall rules to limit access to trusted IP addresses only
  3. Monitor the official GitHub repository (github.com/RVC-Project/Retrieval-based-Voice-Conversion-WebUI) for security updates and patches
  4. Consider disabling or restricting the click_train function and any related endpoints that accept user input for exp_dir1 and similar parameters until a fix is available
  5. Implement input validation and sanitization at a reverse proxy or WAF level as a temporary compensating control

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Retrieval Based Voice Conversion Webui Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA3.0 h
19.0 hours of engineering $3,380
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-43844 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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