CVE-2025-66449: ConvertXis a self-hosted online file converter. In versions prior to 0.16.0, the endpoint `/upload` allows an…
CVE-2025-66449 · Severity: high · CVSS 8.8 · Published 2025-12-16
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.
No. Junglewise Threat Intelligence has no report of CVE-2025-66449 being exploited in the wild.
How severe is CVE-2025-66449?
High severity, with a CVSS score of 8.8, published 16 December 2025.
Which products and versions are affected?
C4illin ConvertX. The advisory does not name versions.
Is there a fix for CVE-2025-66449?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-66449?
Check whether you run C4illin ConvertX. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.