JoomShaper SP Page Builder Unrestricted Upload of File with Dangerous Type Vulnerability
JoomShaper SP Page Builder contains an unrestricted upload of file with dangerous type vulnerability that allows unauthenticated users to upload arbitrary files, ultimately resulting in the upload and execution of PHP code.
Quick answer
JoomShaper SP Page Builder should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- Review vendor advisory for affected versions.
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
JoomShaper SP Page Builder is affected by unrestricted upload of dangerous file types, allowing unauthenticated PHP upload and execution. Update or disable the extension, harden upload directories, and inspect the Joomla installation for webshells. Treat any internet-facing vulnerable site as potentially compromised until file integrity and logs are reviewed.
- Inventory Joomla sites using JoomShaper SP Page Builder and record the installed extension version.
- Upgrade SP Page Builder to the fixed release or disable the extension until the vendor fix is installed.
- Block executable uploads and enforce server-side extension, MIME, and content validation for all upload paths.
- Disable PHP execution in media, images, upload, cache, tmp, and user-writable directories.
- Inspect uploaded files, templates, plugins, administrator accounts, configuration files, and cron jobs for webshells or persistence.
- Rotate Joomla administrator, FTP, SSH, database, and API credentials if suspicious uploads or code execution are found.
- Clear Joomla cache, CDN cache, and opcache after removing malicious files and deploying the update.
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Verify the fix
- Confirm the SP Page Builder version is fixed for CVE-2026-48908 or the extension is disabled.
- Validate unauthenticated users cannot upload dangerous file types or execute PHP from upload locations.
- Review Joomla, web server, and WAF logs for upload attempts and suspicious PHP execution.
- Test legitimate page builder, media, and publishing workflows after the update.
- Run a Fixnx scan and confirm the public Joomla site no longer exposes vulnerable upload behavior.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-48908?
JoomShaper SP Page Builder should be checked against the vendor advisory and trusted references linked on this page.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
Why can this risk appear in multiple categories?
A vulnerability can belong to more than one platform or ecosystem. Fixnx keeps one canonical risk page while also listing it in every relevant category.