Joomla\!Application · Joomla
CVE-2019-7743
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 · uneditedAn issue was discovered in Joomla! before 3.9.3. The phar:// stream wrapper can be used for objection injection attacks because there is no protection mechanism (such as the TYPO3 PHAR stream wrapper) to prevent use of the phar:// handler for non .phar-files.
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 confidenceJoomla! before 3.9.3 lacks protection against phar:// stream wrapper abuse, allowing remote attackers to perform object injection attacks by manipulating phar:// references to deserialize malicious objects from non-.phar files.
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
>= 2.5.0, <= 3.9.2CVSS 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
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 checksWork through these to decide whether this CVE applies to you.
-
Determine installed Joomla! versionAccess the administrator dashboard and check the footer of any admin page for the version number, or inspect the /libraries/cms/version.php file for the $RELEASE constant valueAffected if The version is between 2.5.0 and 3.9.2 inclusive
-
Verify Joomla! is using PHP with phar stream wrapperCheck if the PHP environment has the phar extension enabled by running php -m | grep phar or viewing PHP info pageAffected if phar extension is loaded and Joomla! version is in the affected range
-
Confirm phar:// handling is not restrictedReview Joomla! configuration or PHP settings to determine if phar:// stream wrapper is being processed - look for allow_url_fopen settings in php.iniAffected if phar:// streams are accessible and Joomla! version is in the affected range
A system is affected if Joomla! version is 2.5.0 through 3.9.2 and the phar extension is enabled, allowing phar:// stream wrapper deserialization.
Generated from the published advisory. Verify against your own configuration.
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 · scopedUpgrade to Joomla! 3.9.3 or later which implements PHAR stream wrapper protection to block phar:// handler usage for non-.phar files.
Joomla! 3.9.3 or later (3.x branch)
- Backup your Joomla! installation and database before proceeding
- Download Joomla! 3.9.3 or later from the official Joomla! download page (downloads.joomla.org)
- Upload the upgrade package to your server
- Navigate to Joomla! Administrator > Components > Joomla! Update, or extract the package directly over your existing installation
- Complete the upgrade process and verify the new version in Administrator > System > System Information
- Test critical functionality on your site to ensure extensions remain 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
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-7743 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2019-7743 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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