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CVE-2017-18076

25
FAUCET Score

CVE-2017-18076 describes a vulnerability in OmniAuth versions prior to 1.3.2, where the authenticity_token value is inadequately protected due to POST parameters being stored in the session and accessible during the callback phase. This high-severity vulnerability (CVSS 7.5) has a low attack complexity and could lead to high confidentiality impacts, affecting Debian and OmniAuth products. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.2CPE matchmatch criteria
cpe:2.3:a:omniauth:omniauth:*:*:*:*:*:ruby:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 65th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: omniauthFixed in: 1.3.2

Vendor Advisories (1)

rubygemsGHSA-9pr6-grf4-x2frhigh

Omniauth allows POST parameters to be stored in session

Jan 29, 2018

References

bugs.debian.org / 888523
Issue TrackingThird Party Advisory
github.com / omniauth/omniauth/pull/867
PatchThird Party Advisory
github.com / omniauth/omniauth/pull/867/commits/71866c5264122e196847a3980c43051446a03e9b
PatchThird Party Advisory
debian.org / security/2018/dsa-4109
Third Party Advisory