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.
Affected products
c4illin: convertx
References4
- github.com/C4illin/ConvertX/security/advisories/GHSA-cpww-gwgc-… ExploitVendor Advisory
- github.com/C4illin/ConvertX/security/advisories/GHSA-cpww-gwgc-… ExploitVendor Advisory
- github.com/C4illin/ConvertX/commit/550f472451755d095cf5802bc91f… Patch
- github.com/C4illin/ConvertX/blob/4ae2aab66ace7cdcc14c5a16ecaaf2… Product
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 56 · as of 11 November 2026
- CWE
- CWE-22CWE-73CWE-434
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.