CVE-2016-2049

8.8 highEPSS 2.2%

High (8.8) in janrain php-openid. EPSS 2.2% chance of exploitation in the next 30 days.

examples/consumer/common.php in JanRain PHP OpenID library (aka php-openid) improperly checks the openid.realm parameter against the SERVER_NAME element in the SERVER superglobal array, which might allow remote attackers to hijack the authentication of arbitrary users via vectors involving a crafted HTTP Host header.

Severity

CVSS 3.0

8.8 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 2.2% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-31)
CWE: CWE-284
Published: 2016-02-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

janrain:php-openid

References

http://www.openwall.com/lists/oss-security/2016/01/24/2
http://www.openwall.com/lists/oss-security/2016/01/24/5
http://www.openwall.com/lists/oss-security/2016/01/24/2
http://www.openwall.com/lists/oss-security/2016/01/24/5

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