CVE-2025-27787 Applio allows a DoS in restart.py
Attackers can cause denial of service by killing arbitrary processes via crafted config files, potentially crashing the application and other system services.
- 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-2025-27787?
CVE-2025-27787 is a high-severity denial of service vulnerability in IAHispano Applio, published on 19 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Applio is a voice conversion tool. Versions 3.2.8-bugfix and prior are vulnerable to denial of service (DoS) in restart.py. `model_name` in train.py takes user input, and passes it to the `stop_train` function in restart.py, which uses it construct a path to a folder with `config.json`. That `config.json` is opened and the list of values under "process_pids" are read. Next all the process IDs listed in the JSON are killed. Using one of the arbitrary file writes, one can write to `logs/foobar` a `config.json` file, which contains a list of process IDs. Then one can access this endpoint to kill these processes. Since an attacker can't know what process is running on which process ID, they can send a list of hundreds of process IDs, which can kill the process that applio is using to run, as well as other, potentially important processes, which leads to DoS. Note that constructing a path with user input also enables path traversal. For example, by supplying "../../" in `model_name` one can access `config.json` freom locations two folders down on the server. As of time of publication, no known patches are available.
Which versions are affected by CVE-2025-27787?
It affects 1 product.
Products include Applio Applio.
How do I fix CVE-2025-27787?
No fix has been published for CVE-2025-27787 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-27787 being exploited?
There is no known exploitation of CVE-2025-27787 in the wild and no public exploit code.
Other vulnerabilities in IAHispano Applio
- CVE-2025-27778 Applio allows unsafe deserialization in infer.py
- CVE-2025-27779 Applio allows unsafe deserialization in model_blender.py
- CVE-2025-27780 Applio allows unsafe deserialization in model_information.py
- CVE-2025-27781 Applio allows unsafe deserialization in inference.py
- CVE-2025-27774 Applio allows SSRF and file write in model_download.py