CVE-2013-1948: converter.rb in the md2pdf gem 0.0.1 for Ruby allows context-dependent attackers to execute arbitrary commands

This month

HIGH 10.0DOWNGRADE

CVE-2013-1948 is a high-severity flaw (CVSS 10.0) affecting md2pdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

converter.rb in the md2pdf gem 0.0.1 for Ruby allows context-dependent attackers to execute arbitrary commands via shell metacharacters in a filename.

Why this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	2.2% (top 18%)
CISA exploited list	No
Published	2013-04-25
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: rob westgeest

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-04-25 23:55 UTCPublished CVE record published
2026-06-16 23:52 UTCUpdated Record last modified

rob westgeest md2pdf DOWNGRADE

Affected: 0.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.0.1

1. Check installed version

apt-cache policy md2pdf || rpm -q md2pdf || md2pdf --version

2. No fixed release: DOWNGRADE to a release before 0.0.1 (Debian / Ubuntu)

apt-cache madison md2pdf sudo apt install md2pdf=<VERSION_BEFORE_0.0.1> sudo apt-mark hold md2pdf

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list md2pdf sudo dnf downgrade md2pdf-<VERSION_BEFORE_0.0.1> sudo dnf versionlock add md2pdf

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2013-1948?

md2pdf: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-1948 being exploited?

CVE-2013-1948 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-2013-1948 affect?

CVE-2013-1948 affects md2pdf. Severity is high (CVSS 10.0). converter.rb in the md2pdf gem 0.0.1 for Ruby allows context-dependent attackers to execute arbitrary commands via shell metacharacters in a filename.

How urgent is CVE-2013-1948?

Priority 56/100. Critical severity

Software pages

Ruby vulnerabilities

References

← Back to latest CVEs