CVE-2025-66449
8.8 · HIGHOverview
CVE-2025-66449 is a high-severity vulnerability affecting c4illin convertx. It was published on December 16, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
ConvertXis a self-hosted online file converter. In versions prior to 0.16.0, the endpoint `/upload` allows an authenticated user to write arbitrary files on the system, overwriting binaries and allowing code execution. The upload function takes `file.name` directly from user supplied data without doing any sanitization on the name thus allowing for arbitrary file write. This can be used to overwrite system binaries with ones provided from an attacker allowing full code execution. Version 0.16.0 contains a patch for the issue.
Remediation
Check the references section for vendor advisories and patches from c4illin. Update convertx to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| c4illin | convertx | >= 0, < 0.16.0 | Affected |
References
Frequently Asked Questions
What is CVE-2025-66449?
CVE-2025-66449 is a high-severity vulnerability affecting c4illin convertx. It was published on December 16, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2025-66449?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-66449?
Check the references section for vendor advisories and patches from c4illin. Update convertx to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-66449?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-66449 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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