CVE-2026-3533
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 · uneditedThe Jupiter X Core plugin for WordPress is vulnerable to limited file uploads due to missing authorization on import_popup_templates() function as well as insufficient file type validation in the upload_files() function in all versions up to, and including, 4.14.1. This makes it possible for Authenticated attackers with Subscriber-level access and above, to upload files with dangerous types that can lead to Remote Code Execution on servers configured to handle .phar files as executable PHP (e.g., Apache+mod_php), or Stored Cross-Site Scripting via .svg, .dfxp, or .xhtml files upload on any server configuration
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 confidenceThe Jupiter X Core WordPress plugin has two distinct vulnerabilities: missing authorization checks on import_popup_templates() allowing any authenticated user (Subscriber+) to access the function, and insufficient file type validation in upload_files() permitting dangerous file extensions. Attackers can upload .phar files for RCE on Apache+mod_php configurations, or .svg/.dfxp/.xhtml for stored XSS on any server.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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.
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Confirm Jupiter X Core plugin is installedNavigate to WordPress admin > Plugins and locate 'Jupiter X Core' in the plugin list, or check the /wp-content/plugins/jupiterx-core/ directory exists on the serverAffected if The plugin is present in the WordPress installation
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Identify the installed plugin versionIn WordPress admin > Plugins, click on the plugin name to view details and note the version number displayed, or inspect the main plugin file header in /wp-content/plugins/jupiterx-core/jupiterx-core.php for the 'Version' tagAffected if The version is earlier than 4.14.2 (e.g., 4.14.1, 4.14.0, 4.13.x, etc.)
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Check if file upload functionality is accessible to low-privilege usersAttempt to access the upload_files function or check if Subscriber-level users have permissions to access Jupiter X theme panel features related to template imports or file uploadsAffected if Users with Subscriber role can access upload or import functions without admin-level permissions
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Inspect uploads directory for suspicious file typesCheck the /wp-content/uploads/ directory (and any Jupiter X-specific subdirectories like /jupiterx/ or /elementor/) for recently added files with extensions .phar, .svg, .dfxp, or .xhtml that were not intentionally uploaded by administratorsAffected if Unexpected .phar, .svg, .dfxp, or .xhtml files exist in upload directories, especially in plugin-specific folders
A user is affected if Jupiter X Core version is below 4.14.2 and the plugin or its upload features are active, allowing potential unauthorized file uploads or privilege escalation.
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.
From vendor dataUpdate Jupiter X Core to version 4.14.2 or later; until patched, disable the plugin or restrict Subscriber-level user capabilities to prevent file upload access.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-3533 — 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-2026-3533 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
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- 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