High 8.8Published Dec 16, 2025

CVE-2025-66449ConvertXis a self-hosted online file converter.

Updated under an hour ago (2026-10-19 07:30 UTC)

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It affects c4illin convertx. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for c4illin convertx

Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-22, CWE-73, CWE-434
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

c4illin convertx c4illin:convertx	before 0.16.0	NVD

References

https://github.com/C4illin/ConvertX/blob/4ae2aab66ace7cdcc14c5a16ecaaf2372b9ccbdf/src/pages/upload.tsx#L27-L30product
https://github.com/C4illin/ConvertX/commit/550f472451755d095cf5802bc91f403e85b7129epatch
https://github.com/C4illin/ConvertX/security/advisories/GHSA-cpww-gwgc-p72rexploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.