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CVE-2015-8314

21
FAUCET Score

CVE-2015-8314 describes a vulnerability in the Devise gem before version 3.5.4 for Ruby, where improper handling of "Remember Me" cookies could lead to unauthorized persistent application access. This vulnerability carries a high CVSS score of 7.5, indicating a network-based attack vector with low complexity, allowing an attacker to achieve high confidentiality impact without user interaction. Despite its severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.5.4CPE matchmatch criteria
cpe:2.3:a:heartcombo:devise:*:*:*:*:*:ruby:*:*

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
0.62%
Probability of exploitation in next 30 days
EPSS Percentile
46.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0062 is in the 23rd 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: deviseFixed in: 3.5.4

Vendor Advisories (1)

rubygemsGHSA-746g-3gfp-hfhwhigh

Devise Gem for Ruby Unauthorized Access Using "Remember Me" Cookie

Jan 26, 2023

References

github.com / advisories/GHSA-746g-3gfp-hfhw
PatchThird Party Advisory
github.com / heartcombo/devise/commit/c92996646aba2d25b2c3e235fe0c4f1a84b70d24
Patch
rubysec.com / advisories/CVE-2015-8314
Third Party Advisory