CVE-2026-11603
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 Product Filter Widget for Elementor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'args[filterFormArray]' Parameter in all versions up to, and including, 1.0.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The endpoint is registered via wp_ajax_nopriv_ with no nonce verification or capability check, and exploitation is delivered via a CSRF-style form auto-submission to the admin-ajax.php endpoint, requiring the attacker to trick a victim into visiting an attacker-controlled page.
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 Product Filter Widget for Elementor plugin has a reflected XSS vulnerability in the 'args[filterFormArray]' parameter. The AJAX endpoint is registered via wp_ajax_nopriv_ without nonce verification or capability checks, allowing unauthenticated attackers to inject malicious scripts that execute when victims are tricked into clicking a crafted link.
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
- 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 checksWork through these to decide whether this CVE applies to you.
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Confirm plugin is installedCheck the WordPress plugins directory or wp-admin plugins list for 'Product Filter Widget for Elementor' and note the installed version numberAffected if The plugin is present and installed version is 1.0.6 or lower (all versions up to 1.0.6 are affected)
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Verify plugin is activeCheck in WordPress admin under Plugins > Installed Plugins whether the Product Filter Widget for Elementor plugin is activatedAffected if The plugin is currently active and version is 1.0.6 or below
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Test vulnerable endpoint accessibilitySend a crafted GET or POST request to /wp-admin/admin-ajax.php?action=...&args[filterFormArray]=<script>alert(1)</script> (use the actual action name from the plugin)Affected if The admin-ajax.php endpoint responds and reflects the args[filterFormArray] parameter value without sanitization
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Check WordPress ajax actionsReview plugin source code or monitor network requests when using the filter widget to identify the specific wp_ajax_nopriv_ action handler that processes filterFormArrayAffected if A wp_ajax_nopriv_ action exists that handles filterFormArray without sanitization and without nonce verification
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Verify lack of capability checksExamine the plugin PHP code for current_user_can() or capability checks in the ajax handler handling filterFormArrayAffected if No capability checks are performed and the endpoint is accessible to unauthenticated users (wp_ajax_nopriv_)
The environment is affected if Product Filter Widget for Elementor plugin version 1.0.6 or lower is installed and active, with the admin-ajax.php endpoint accessible to unauthenticated users and the filterFormArray parameter being reflected without sanitization.
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 · scopedUpdate the plugin to version 1.0.7 or later which contains the fix. Until then, consider disabling the plugin or deploying WAF rules to block requests to admin-ajax.php containing the vulnerable parameter.
Product Filter Widget for Elementor version 1.0.7 or later (verify current latest version at plugins.trac.wordpress.org)
- Check the WordPress plugin repository for the Product Filter Widget for Elementor plugin to confirm if a version newer than 1.0.7 has been released with security fixes
- If a fixed version (1.0.7 or later) is available, update the plugin through the WordPress admin dashboard or via WP-CLI: wp plugin update product-filter-widget-for-elementor
- After updating, verify the fix by checking that the args[filterFormArray] parameter is properly sanitized on the admin-ajax.php endpoint
- If no fixed version is available, consider temporarily disabling the plugin until a patch is released
- Alternatively, contact the plugin developer directly through the WordPress support forums or their published contact information to request a security patch
- Monitor the plugin's changelog and the Wordfence vulnerability feed for any security updates
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-11603 — 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-2026-11603 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