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Active ResourceApplication · Rubyonrails

CVE-2020-8151

HIGH · 7.5 CVSS v3.1 Published 2020-05-12
Fix available
A fix is available. Upgrade to 5.1.1 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
There is a possible information disclosure issue in Active Resource <v5.1.1 that could allow an attacker to create specially crafted requests to access data in an unexpected way and possibly leak information.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

An information disclosure vulnerability in Active Resource versions before 5.1.1 allows attackers to craft special requests that access data in unexpected ways, potentially leaking sensitive information.

MitigationUpgrade Active Resource to version 5.1.1 or later to patch the vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Active ResourceApplication
Affected:< 5.1.1
FedoraOperating system
Affected:= 33

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Active Resource is in use
    Check your application's Gemfile.lock for the 'activeresource' gem entry, or run 'gem list active resource' in your Ruby environment
    Affected if The gem is present and listed in your dependencies
  2. Determine the installed Active Resource version
    Run 'gem list active resource' or check the version line in your Gemfile.lock for the activeresource gem
    Affected if The version shown is lower than 5.1.1 (for example, 5.1.0, 5.0.0, etc.)
  3. Confirm the Rails application uses Active Resource
    Search your codebase for 'ActiveResource::Base' or 'active_resource' model definitions, or check if any model classes inherit from ActiveResource::Base
    Affected if Your application contains models that extend ActiveResource::Base and makes remote API calls

You are affected if Active Resource is used in your application and the installed version is less than 5.1.1.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 5.1.1 or later
Fixed in 5.1.1
Interim mitigation

Upgrade Active Resource to version 5.1.1 or later to patch the vulnerability.

Fix this in Active Resource Scoped from the published advisory
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing8.0 h
  • Review / QA4.0 h
20.0 hours of engineering $3,440
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,504.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-8151 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data