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

Q: How do I fix CVE-2025-66449?

convertx: upgrade to 0.16.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-66449 being exploited?

CVE-2025-66449 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-66449 affect?

CVE-2025-66449 affects convertx. Severity is high (CVSS 8.8). 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 t

Q: How urgent is CVE-2025-66449?

Priority 50/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2025-66449 is a high-severity flaw (CVSS 8.8) affecting convertx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 atta

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-22, CWE-73, CWE-434
Published	2025-12-16
Last modified	2026-10-07

Publisher (CNA): GitHub, Inc. · Vendor: c4illin

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-16 01:15 UTCPublished CVE record published
2026-10-07 19:10 UTCUpdated Record last modified

c4illin convertx UPGRADE

Affected: < 0.16.0

Fixed in: 0.16.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy convertx || rpm -q convertx || convertx --version

2. UPGRADE to 0.16.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade convertx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade convertx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-66449?

convertx: upgrade to 0.16.0. Exact commands for each OS are on this page.

Is CVE-2025-66449 being exploited?

CVE-2025-66449 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-66449 affect?

CVE-2025-66449 affects convertx. Severity is high (CVSS 8.8). 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 t

How urgent is CVE-2025-66449?

Priority 50/100. High severity; Public exploit reference

Related CVEs

CVE-2026-24741 HIGH 8.1 UPGRADE ConvertXis a self-hosted online file converter

References

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