CVE-2026-45437 Overview
CVE-2026-45437 is an unauthenticated Cross-Site Scripting (XSS) vulnerability affecting the Product Filter Widget for Elementor WordPress plugin in versions up to and including 1.0.6. The flaw is categorized under [CWE-79] (Improper Neutralization of Input During Web Page Generation). An attacker can inject malicious script content that executes in the browser context of any user who interacts with a crafted link or page. Because the vulnerability requires no authentication and only minimal user interaction, it is well suited to phishing and session-hijacking campaigns against WordPress site visitors and administrators.
Critical Impact
Unauthenticated attackers can execute arbitrary JavaScript in a victim's browser session, enabling credential theft, session hijacking, and administrative account takeover on affected WordPress sites.
Affected Products
- Product Filter Widget for Elementor WordPress plugin
- Versions <= 1.0.6
- WordPress sites using Elementor with this filter widget installed
Discovery Timeline
- 2026-06-15 - CVE-2026-45437 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-45437
Vulnerability Analysis
The Product Filter Widget for Elementor plugin fails to properly sanitize and escape user-supplied input before rendering it within HTML responses. This results in a reflected Cross-Site Scripting (XSS) condition that an unauthenticated attacker can trigger over the network. The exploit requires the victim to interact with attacker-controlled content, such as clicking a crafted link pointing at the vulnerable site.
Successful exploitation allows execution of arbitrary JavaScript in the victim's browser within the context of the targeted WordPress site. Because the scope is changed (the injected script can affect resources beyond the vulnerable component), an attacker can read or alter content on adjacent pages, exfiltrate cookies, or trigger authenticated actions if an administrator is the victim.
Root Cause
The root cause is improper neutralization of input passed to the filter widget. The plugin reflects request parameters into the rendered HTML without applying WordPress escaping functions such as esc_html(), esc_attr(), or wp_kses(). As a result, HTML and JavaScript control characters supplied by the attacker are interpreted by the browser rather than treated as literal text.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker crafts a URL containing a malicious payload targeting a vulnerable filter parameter, then delivers the URL through phishing email, social media, or a malicious advertisement. When a user visits the link, the WordPress site reflects the payload, and the browser executes it. No prior authentication or privileges are needed on the target site.
Detailed technical context is available in the Patchstack Vulnerability Report.
Detection Methods for CVE-2026-45437
Indicators of Compromise
- HTTP request logs containing <script>, javascript:, onerror=, or onload= patterns in query parameters directed at filter widget endpoints.
- URL-encoded payloads such as %3Cscript%3E or %3Cimg targeting Elementor product filter pages.
- Outbound browser requests to unfamiliar domains immediately after users load pages containing the plugin.
- Unexpected administrator session activity or cookie exfiltration events originating from visitor traffic.
Detection Strategies
- Inspect web server access logs for suspicious query strings on pages where the Product Filter Widget for Elementor is rendered.
- Deploy a web application firewall (WAF) rule that flags reflected XSS payloads in GET and POST parameters.
- Correlate browser console errors and Content Security Policy (CSP) violation reports with specific WordPress pages.
Monitoring Recommendations
- Monitor the WordPress plugin inventory for installations of Product Filter Widget for Elementor at or below version 1.0.6.
- Track changes to administrator accounts, theme files, and plugin files that follow visits from suspicious referrers.
- Enable and review CSP violation reports to identify in-the-wild exploitation attempts against the affected plugin.
How to Mitigate CVE-2026-45437
Immediate Actions Required
- Identify all WordPress sites running the Product Filter Widget for Elementor plugin and confirm whether the installed version is <= 1.0.6.
- Update the plugin to a patched release as soon as the vendor publishes one, or deactivate and remove the plugin if no fix is available.
- Rotate administrator credentials and invalidate active sessions if exploitation is suspected.
Patch Information
At the time of publication, refer to the Patchstack Vulnerability Report for the latest patch availability and remediation guidance. Versions after 1.0.6 should include proper output escaping for filter parameters.
Workarounds
- Deactivate the Product Filter Widget for Elementor plugin until a verified patch is installed.
- Deploy WAF rules that block requests containing HTML or JavaScript control characters in filter widget parameters.
- Implement a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
- Educate administrators to avoid clicking unverified links to their own WordPress sites while logged in.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
