CVE-2019-11066: openid.php in LightOpenID through 1.3.1 allows SSRF via a crafted OpenID 2.0 assertion request using the HTTP

Q: How do I fix CVE-2019-11066?

lightopenid: upgrade to newer than 1.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2019-11066 being exploited?

CVE-2019-11066 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-2019-11066 affect?

CVE-2019-11066 affects lightopenid. Severity is critical (CVSS 9.8). openid.php in LightOpenID through 1.3.1 allows SSRF via a crafted OpenID 2.0 assertion request using the HTTP GET method.

Q: How urgent is CVE-2019-11066?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2019-11066 is a critical-severity flaw (CVSS 9.8) affecting lightopenid. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

openid.php in LightOpenID through 1.3.1 allows SSRF via a crafted OpenID 2.0 assertion request using the HTTP GET method.

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	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-918
Published	2019-05-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: lightopenid project

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

Am I affected?

Timeline

2019-05-10 20:29 UTCPublished CVE record published
2026-06-17 02:12 UTCUpdated Record last modified

lightopenid project lightopenid UPGRADE

Affected: <= 1.3.1

Fixed in: newer than 1.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.3.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lightopenid

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-2019-11066?

lightopenid: upgrade to newer than 1.3.1. Exact commands for each OS are on this page.

Is CVE-2019-11066 being exploited?

CVE-2019-11066 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-2019-11066 affect?

CVE-2019-11066 affects lightopenid. Severity is critical (CVSS 9.8). openid.php in LightOpenID through 1.3.1 allows SSRF via a crafted OpenID 2.0 assertion request using the HTTP GET method.

How urgent is CVE-2019-11066?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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