CVE-2018-18447: dotPDN Paint.NET before 4.1.2 allows Deserialization of Untrusted Data (issue 2 of 2).

Q: How do I fix CVE-2018-18447?

paint.net: upgrade to 4.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2018-18447 being exploited?

CVE-2018-18447 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-2018-18447 affect?

CVE-2018-18447 affects paint.net. Severity is critical (CVSS 9.8). dotPDN Paint.NET before 4.1.2 allows Deserialization of Untrusted Data (issue 2 of 2).

Q: How urgent is CVE-2018-18447?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-18447 is a critical-severity flaw (CVSS 9.8) affecting paint.net. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

dotPDN Paint.NET before 4.1.2 allows Deserialization of Untrusted Data (issue 2 of 2).

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-502
Published	2022-10-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dotpdn

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

Am I affected?

Timeline

2022-10-12 21:15 UTCPublished CVE record published
2026-06-17 01:47 UTCUpdated Record last modified

dotpdn paint.net UPGRADE

Affected: < 4.1.2

Fixed in: 4.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy paint.net || rpm -q paint.net || paint.net --version

2. UPGRADE to 4.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade paint.net

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade paint.net

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-2018-18447?

paint.net: upgrade to 4.1.2. Exact commands for each OS are on this page.

Is CVE-2018-18447 being exploited?

CVE-2018-18447 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-2018-18447 affect?

CVE-2018-18447 affects paint.net. Severity is critical (CVSS 9.8). dotPDN Paint.NET before 4.1.2 allows Deserialization of Untrusted Data (issue 2 of 2).

How urgent is CVE-2018-18447?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2018-18446 CRITICAL 9.8 UPGRADE dotPDN Paint.NET before 4.1.2 allows Deserialization of Untrusted Data (issue 1 of 2).

References

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