CVE-2025-27782
📋 TL;DR
Applio voice conversion tool versions 3.2.8-bugfix and prior contain an arbitrary file write vulnerability in inference.py that allows attackers to write files to the server. Combined with unsafe deserialization, this can lead to remote code execution. All users running vulnerable versions are affected.
💻 Affected Systems
- Applio
📦 What is this software?
Applio by Applio
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise via remote code execution leading to data theft, ransomware deployment, or complete server takeover.
Likely Case
Arbitrary file writes enabling privilege escalation, data manipulation, or persistence mechanisms.
If Mitigated
Limited impact if proper network segmentation and least privilege principles are enforced.
🎯 Exploit Status
The vulnerability is in inference.py with multiple vulnerable code paths. No public exploit code is known, but the technical details are published.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: https://securitylab.github.com/advisories/GHSL-2024-341_GHSL-2024-353_Applio/
Restart Required: No
Instructions:
No official patch is available. Monitor the Applio GitHub repository for updates.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to Applio instances to trusted networks only.
Use firewall rules to block external access to Applio ports
File System Restrictions
linuxRun Applio with minimal file system permissions using containerization or restricted user accounts.
docker run --read-only --tmpfs /tmp -u nobody applio
chroot /applio-restricted
🧯 If You Can't Patch
- Immediately take Applio instances offline until a patch is available.
- Implement strict network segmentation and monitor for suspicious file write activities.
🔍 How to Verify
Check if Vulnerable:
Check the Applio version. If it's 3.2.8-bugfix or earlier, it's vulnerable.Check Version:
Check the version in Applio's interface or configuration files.Verify Fix Applied:
Verify the version is updated beyond 3.2.8-bugfix when a patch becomes available.📡 Detection & Monitoring
Log Indicators:
- Unusual file write operations in inference.py logs
- Suspicious deserialization attempts
Network Indicators:
- Unexpected connections to Applio inference endpoints
- Anomalous POST requests to inference.py
SIEM Query:
source="applio" AND (event="file_write" OR event="deserialize")🔗 References
- https://github.com/IAHispano/Applio/blob/d7d685fefd0c58e29e1d84d668613056791544a7/tabs/inference/inference.py#L1632-L1645
- https://github.com/IAHispano/Applio/blob/d7d685fefd0c58e29e1d84d668613056791544a7/tabs/inference/inference.py#L295
- https://github.com/IAHispano/Applio/blob/d7d685fefd0c58e29e1d84d668613056791544a7/tabs/inference/inference.py#L989-L1002
- https://github.com/IAHispano/Applio/blob/d7d685fefd0c58e29e1d84d668613056791544a7/tabs/tts/tts.py#L309-L322
- https://securitylab.github.com/advisories/GHSL-2024-341_GHSL-2024-353_Applio/
