CVE-2013-1812: The ruby-openid gem before 2.2.2 for Ruby allows remote OpenID providers to cause a denial of service (CPU con

Q: How do I fix CVE-2013-1812?

fedora: mitigate or apply the listed mitigation; ruby-openid: upgrade to newer than 2.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2013-1812 being exploited?

CVE-2013-1812 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-2013-1812 affect?

CVE-2013-1812 affects fedora, ruby-openid. Severity is medium (CVSS 4.3). The ruby-openid gem before 2.2.2 for Ruby allows remote OpenID providers to cause a denial of service (CPU consumption) via (1) a large XRDS document or (2) an XML Entity Expansion (XEE) attack.

Q: How urgent is CVE-2013-1812?

Priority 41/100. Public exploit reference

This month

MEDIUM 4.3MITIGATEUPGRADE

CVE-2013-1812 is a medium-severity flaw (CVSS 4.3) affecting fedora, ruby-openid. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The ruby-openid gem before 2.2.2 for Ruby allows remote OpenID providers to cause a denial of service (CPU consumption) via (1) a large XRDS document or (2) an XML Entity Expansion (XEE) attack.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-399
Published	2013-12-12
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: fedoraproject · janrain

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

Am I affected?

Timeline

2013-12-12 18:55 UTCPublished CVE record published
2026-06-16 23:52 UTCUpdated Record last modified

fedoraproject fedora MITIGATE

Affected: 17 · 18

Fixed in: no fixed release known

Safe to downgrade to: a release before 17

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

janrain ruby-openid UPGRADE

Affected: <= 2.2.1 · 2.2.0

Fixed in: newer than 2.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ruby-openid || rpm -q ruby-openid || ruby-openid --version

2. UPGRADE to newer than 2.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ruby-openid

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ruby-openid

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-2013-1812?

fedora: mitigate or apply the listed mitigation; ruby-openid: upgrade to newer than 2.2.1. Exact commands for each OS are on this page.

Is CVE-2013-1812 being exploited?

CVE-2013-1812 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-2013-1812 affect?

CVE-2013-1812 affects fedora, ruby-openid. Severity is medium (CVSS 4.3). The ruby-openid gem before 2.2.2 for Ruby allows remote OpenID providers to cause a denial of service (CPU consumption) via (1) a large XRDS document or (2) an XML Entity Expansion (XEE) attack.

How urgent is CVE-2013-1812?

Priority 41/100. Public exploit reference

Software pages

Ruby vulnerabilities

Related CVEs

CVE-2023-42756 MEDIUM 4.4 UPGRADE MITIGATE A flaw was found in the Netfilter subsystem of the Linux kernel
CVE-2024-3056 HIGH 7.7 UPGRADE DOWNGRADE A flaw was found in Podman
CVE-2023-2462 MEDIUM 4.3 UPGRADE MITIGATE Inappropriate implementation in Prompts in Google Chrome prior to 113.0.5672.63 allowed a remote attacker to o
CVE-2023-2468 MEDIUM 4.3 UPGRADE MITIGATE Inappropriate implementation in PictureInPicture in Google Chrome prior to 113.0.5672.63 allowed a remote atta
CVE-2026-35093 HIGH 8.8 UPGRADE MITIGATE A flaw was found in libinput

References

← Back to latest CVEs