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Joomla\!Application · Joomla

CVE-2024-40747

MEDIUM · 6.1 CVSS v3.1 Published 2025-01-07
Fix available
A fix is available. Upgrade to 4.4.10 / 5.2.3 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
Various module chromes didn't properly process inputs, leading to XSS vectors.

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

This is a Cross-Site Scripting (XSS) vulnerability in module chromes (likely UI frame/template components) where user-supplied inputs are not properly sanitized or encoded before rendering, allowing attackers to inject malicious scripts into the web interface.

MitigationImplement proper input validation, output encoding, and context-aware sanitization for all user-supplied data rendered in module chrome components; apply vendor patches when available.

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:>= 4.0.0, < 4.4.10>= 5.0.0, < 5.2.3

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
    Log into the Joomla administrator panel and navigate to System > Information, or inspect the libraries/cms.php file for the VERSION definition, or check the /libraries/src/Version.php file for the version string
    Affected if The version is 4.0.0 through 4.4.9, or 5.0.0 through 5.2.2
  2. Identify custom module chrome templates
    Examine the templates/system/html/ directory and any custom template directories (templates/YOUR_TEMPLATE/html/) for module chrome overrides - look for .php files named mod_chrome or custom module template files
    Affected if Custom module chrome files exist that may render user-supplied data without sanitization
  3. Check module configurations for custom chrome assignments
    Navigate to Content > Site Modules or Content > Administrator Modules in the Joomla admin panel, review module settings for any custom chrome or template style assignments that could invoke vulnerable code paths
    Affected if Modules are assigned custom chrome or template styles that bypass core Joomla output encoding
  4. Review custom template overrides for module rendering
    Inspect any custom template's html/ folder for overrides of modules (typically modules.php or default.php files) that may contain unsanitized user input rendering
    Affected if Custom template overrides exist that render module parameters or user data without proper encoding

You are affected if your Joomla installation version falls within 4.0.0 to 4.4.9 or 5.0.0 to 5.2.2 AND you use custom module chrome templates or template overrides that render unsanitized user input.

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.

dbcve · scoped
Upgrade available Upgrade to 4.4.10 / 5.2.3 or later
Fixed in 4.4.105.2.3
Interim mitigation

Implement proper input validation, output encoding, and context-aware sanitization for all user-supplied data rendered in module chrome components; apply vendor patches when available.

Recommended fix High confidence

Joomla 4.4.10 (for 4.x branches) or Joomla 5.2.3 (for 5.x branches)

  1. 1. Create a full backup of the Joomla site (database and files) before proceeding
  2. 2. Log in to the Joomla Administrator backend
  3. 3. Navigate to System > Update > Joomla Update
  4. 4. Check for updates and select Joomla 4.4.10 (or 5.2.3 if running Joomla 5.x)
  5. 5. Click Install Update to apply the security patch
  6. 6. Alternatively, download the update package from downloads.joomla.org and install via Extensions > Install
  7. 7. After update, verify the site functionality and check that the module chromes work correctly
  8. 8. Clear any Joomla and browser caches
Caveat Patch releases typically have minimal breaking changes; verify custom templates/modules are compatible

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Joomla\! Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2024-40747 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