Security readout for executives and security teams
Plain-English summary
Older Devise versions can mishandle Remember Me cookies, allowing someone who obtains the relevant cookie material to keep access to an application without normal reauthentication. The business risk is persistent unauthorized account access, especially in Ruby applications that rely on Devise for authentication.
Executive priority
Treat this as a high-priority dependency remediation for Ruby applications handling user accounts. It is most urgent where internet-facing systems use Devise and persistent login cookies, because successful abuse could preserve unauthorized access.
Technical view
CVE-2015-8314 affects the Devise Ruby gem before 3.5.4. The issue is categorized as CWE-312 and impacts Remember Me session handling. The CVSS 3.1 score is 7.5, reflecting network reachability, low complexity, no privileges, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is most likely in Ruby or Rails applications using Devise versions before 3.5.4, particularly where Remember Me functionality is enabled. The source bundle does not identify specific downstream products or CPEs.
Exploitation context
The provided sources do not show CISA KEV listing or cited evidence of active exploitation. The concern is unauthorized persistent application access through mishandled Remember Me cookies, not application takeover or availability loss based on the supplied evidence.
Researcher notes
The affected record is sparse: vendor and product fields are listed as n/a, with references pointing to RubySec, GitHub Advisory, and the Devise fix commit. Avoid expanding scope beyond Devise before 3.5.4 unless confirmed by local dependency evidence.
Mitigation direction
- Upgrade Devise to version 3.5.4 or later.
- Inventory Ruby applications that depend on Devise.
- Identify applications with Remember Me functionality enabled.
- Review Devise advisory guidance for session or cookie cleanup steps.
- Prioritize externally accessible authentication surfaces first.
Validation and detection
- Check dependency manifests and lockfiles for Devise versions before 3.5.4.
- Confirm whether affected applications enable Remember Me behavior.
- Review SBOM or dependency scanner results for CVE-2015-8314.
- Verify upgraded deployments are running Devise 3.5.4 or later.
- Look for unusual persistent sessions where application logs support that review.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-312: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2015-8314 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://rubysec.com/advisories/CVE-2015-8314/CVE reference
- https://github.com/advisories/GHSA-746g-3gfp-hfhwCVE reference
- https://github.com/heartcombo/devise/commit/c92996646aba2d25b2c3e235fe0c4f1a84b70d24CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Cleartext Storage of Sensitive Information
Cleartext Storage of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.