CVE-2020-12473: MonoX through 5.1.40.5152 allows admins to execute arbitrary programs by reconfiguring the Converter Executabl

Q: How do I fix CVE-2020-12473?

monox: upgrade to newer than 5.1.40.5152. Exact commands for each OS are on this page.

Q: Is CVE-2020-12473 being exploited?

CVE-2020-12473 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-2020-12473 affect?

CVE-2020-12473 affects monox. Severity is high (CVSS 7.2). MonoX through 5.1.40.5152 allows admins to execute arbitrary programs by reconfiguring the Converter Executable setting from ffmpeg.exe to a different program.

Q: How urgent is CVE-2020-12473?

Priority 48/100. High severity; Public exploit reference

This month

HIGH 7.2UPGRADE

CVE-2020-12473 is a high-severity flaw (CVSS 7.2) affecting monox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MonoX through 5.1.40.5152 allows admins to execute arbitrary programs by reconfiguring the Converter Executable setting from ffmpeg.exe to a different program.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Published	2020-04-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mono

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-29 20:15 UTCPublished CVE record published
2026-06-17 02:51 UTCUpdated Record last modified

mono monox UPGRADE

Affected: <= 5.1.40.5152

Fixed in: newer than 5.1.40.5152

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 5.1.40.5152 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade monox

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-2020-12473?

monox: upgrade to newer than 5.1.40.5152. Exact commands for each OS are on this page.

Is CVE-2020-12473 being exploited?

CVE-2020-12473 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-2020-12473 affect?

CVE-2020-12473 affects monox. Severity is high (CVSS 7.2). MonoX through 5.1.40.5152 allows admins to execute arbitrary programs by reconfiguring the Converter Executable setting from ffmpeg.exe to a different program.

How urgent is CVE-2020-12473?

Priority 48/100. High severity; Public exploit reference

Software pages

FFmpeg vulnerabilities

Related CVEs

CVE-2020-12472 MEDIUM 5.4 UPGRADE MonoX through 5.1.40.5152 allows stored XSS via User Status, Blog Comments, or Blog Description.
CVE-2020-12471 CRITICAL 9.8 UPGRADE MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-U
CVE-2020-12470 HIGH 7.2 UPGRADE MonoX through 5.1.40.5152 allows administrators to execute arbitrary code by modifying an ASPX template.

References

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