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Joomla\!Application · Joomla

CVE-2020-24598

MEDIUM · 6.1 CVSS v3.1 Published 2020-08-26
Fix available
A fix is available. Upgrade to 3.9.21 or later.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges

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
An issue was discovered in Joomla! before 3.9.21. Lack of input validation in the vote feature of com_content leads to an open redirect.

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 · high confidence

An open redirect vulnerability in Joomla!'s com_content voting feature (versions before 3.9.21) exists due to lack of input validation on the redirect URL parameter. Attackers can craft malicious URLs to redirect users to arbitrary external websites.

MitigationUpgrade to Joomla! version 3.9.21 or later, which implements proper input validation for the vote feature redirect. Alternatively, disable the article voting feature in com_content if not needed.

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
Joomla\!Application
Affected:>= 3.0.0, < 3.9.21

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
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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. Check installed Joomla version
    Locate and inspect the Joomla version file (typically libraries/cms/version.php or the administrative panel under Help > System Info > PHP Settings), or run: php -r "require_once('libraries/cms/version.php'); $v=new JVersion; echo $v->getShortVersion();"
    Affected if version is >= 3.0.0 and < 3.9.21
  2. Verify com_content voting is enabled
    In Joomla administrator panel, navigate to Content > Articles > Options (or similar com_content configuration), or inspect the #__extensions table for the com_content component and check the enabled state
    Affected if the voting functionality is enabled in com_content component settings
  3. Inspect voting feature configuration
    Check the com_content component parameters in the database table #__extensions (param column) or in configuration.xml for any redirect-related settings that accept user-supplied URLs
    Affected if redirect parameters in voting config accept arbitrary URLs without validation

User is affected if Joomla version is between 3.0.0 and 3.9.20 AND the com_content voting feature is enabled and configured to accept redirect parameters.

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 3.9.21 or later
Fixed in 3.9.21
Interim mitigation

Upgrade to Joomla! version 3.9.21 or later, which implements proper input validation for the vote feature redirect. Alternatively, disable the article voting feature in com_content if not needed.

Fix this in Joomla\! Scoped from the published advisory
  • Consultation4.0 h
  • Implementation3.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,300
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,680.

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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-2020-24598 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