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CVE-2026-11603 brthumar1959 CVE debrief

The Product Filter Widget for Elementor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'args[filterFormArray]' parameter in all versions up to, and including, 1.0.6. This vulnerability is due to insufficient input sanitization and output escaping. An unauthenticated attacker can inject arbitrary web scripts into 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.

Vendor
brthumar1959
Product
Product Filter Widget for Elementor
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-09
Advisory published
2026-06-09
Advisory updated
2026-06-09

Who should care

Users of the Product Filter Widget for Elementor plugin for WordPress, particularly those with versions up to and including 1.0.6, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability has a CVSS score of 6.1 and is classified as MEDIUM severity. It allows for Reflected Cross-Site Scripting (XSS) attacks, which can lead to unauthorized actions on behalf of the user.

Defensive priority

High

Recommended defensive actions

  • Update the Product Filter Widget for Elementor plugin to a version that fixes this vulnerability.
  • Implement additional security measures such as input validation and output encoding to prevent similar vulnerabilities.
  • Educate users about the risks of clicking on suspicious links and the importance of verifying the authenticity of requests.

Evidence notes

The CVE record [cve-org] and NVD detail [nvd] provide official information about this vulnerability. Additional references can be found at [ref-4] and [ref-5].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11603 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11603

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11603 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11603

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://plugins.trac.wordpress.org/browser/product-filter-widget-for-elementor/trunk/inc/controller/Eszpf_Ajax_Handler.php

    [email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.