CVE-2011-3707: JanRain PHP OpenID library (aka php-openid) 2.2.2 allows remote attackers to obtain sensitive information via

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MEDIUM 5.0DOWNGRADE

CVE-2011-3707 is a medium-severity flaw (CVSS 5.0) affecting php-openid. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JanRain PHP OpenID library (aka php-openid) 2.2.2 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by Auth/Yadis/Yadis.php and certain other files.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-200
Published	2011-09-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: janrain

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

Am I affected?

Timeline

2011-09-23 23:55 UTCPublished CVE record published
2026-06-16 23:33 UTCUpdated Record last modified

janrain php-openid DOWNGRADE

Affected: 2.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.2.2 (Debian / Ubuntu)

apt-cache madison php-openid sudo apt install php-openid=<VERSION_BEFORE_2.2.2> sudo apt-mark hold php-openid

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

dnf --showduplicates list php-openid sudo dnf downgrade php-openid-<VERSION_BEFORE_2.2.2> sudo dnf versionlock add php-openid

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-2011-3707?

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

Is CVE-2011-3707 being exploited?

CVE-2011-3707 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-2011-3707 affect?

CVE-2011-3707 affects php-openid. Severity is medium (CVSS 5.0). JanRain PHP OpenID library (aka php-openid) 2.2.2 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by Auth/Yadis/Yadis.php

How urgent is CVE-2011-3707?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2016-2049 HIGH 8.8 MITIGATE examples/consumer/common.php in JanRain PHP OpenID library (aka php-openid) improperly checks the openid.realm
CVE-2013-4701 HIGH 7.5 UPGRADE Auth/Yadis/XML.php in PHP OpenID Library 2.2.2 and earlier allows remote attackers to read arbitrary files, se

References

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