CVE-2017-18076

Name: CVE-2017-18076
Creator: NVD / NIST
Published: 2018-01-26T19:29:00.26+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.14%

Last modified Jun 17, 2026

CVE-2017-18076 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In strategy.rb in OmniAuth before 1.3.2, the authenticity_token value is improperly protected because POST (in addition to GET) parameters are stored in the session and become available in the environment of the callback phase.. EPSS estimates a 2.14% chance of exploitation in the next 30 days.

Description

In strategy.rb in OmniAuth before 1.3.2, the authenticity_token value is improperly protected because POST (in addition to GET) parameters are stored in the session and become available in the environment of the callback phase.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

2.14%

79.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Omniauth	Omniauth	< 1.3.2
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

https://bugs.debian.org/888523Issue Tracking, Third Party Advisory
https://github.com/omniauth/omniauth/pull/867Patch, Third Party Advisory
https://github.com/omniauth/omniauth/pull/867/commits/71866c5264122e196847a3980c43051446a03e9bPatch, Third Party Advisory
https://www.debian.org/security/2018/dsa-4109Third Party Advisory
https://bugs.debian.org/888523Issue Tracking, Third Party Advisory
https://github.com/omniauth/omniauth/pull/867Patch, Third Party Advisory
https://github.com/omniauth/omniauth/pull/867/commits/71866c5264122e196847a3980c43051446a03e9bPatch, Third Party Advisory
https://www.debian.org/security/2018/dsa-4109Third Party Advisory

Timeline

Published: Jan 26, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-18076?

How severe is CVE-2017-18076?

CVE-2017-18076 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.14% probability of exploitation in the next 30 days.

How do I fix CVE-2017-18076?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-18076?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST