Filter Everything — WordPress & WooCommerce Filters <= 1.9.6 - Reflected Cross-Site Scripting via Elementor Posts Widget Pagination URL
Strategic Overview
- Status
- Patched in 1.9.7
- Affected Plugin
- Filter Everything — WordPress & WooCommerce Filters
- Affected Version
<= 1.9.6- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2026-87869
At a glance
CVE-2026-87869 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Filter Everything — WordPress & WooCommerce Filters WordPress plugin, affecting versions <= 1.9.6. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.9.7; sites on affected versions should update now. Disclosed October 2026, reported by Omar Elshopky (3l5h0pky).
Vulnerability Overview
The Filter Everything — WordPress & WooCommerce Filters plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 1.9.6. This is due to insufficient input sanitization and output escaping in the flrt_elementor_load_more_anchor() function. The function reads query parameters from $_SERVER['REQUEST_URI'] via getFormActionOrFullPageUrl(true), which URL-decodes them through parse_str() and re-assembles them using build_query() — a WordPress core function that does NOT re-encode values ($urlencode=false). The resulting URL, containing unescaped special characters, is injected into a data-next-page HTML attribute via preg_replace() without esc_attr() or esc_url(). 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 specially crafted link.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Filter Everything — WordPress & WooCommerce Filters <= 1.9.6 carries this weakness at REQUEST_URI, and reaching it takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Filter Everything — WordPress & WooCommerce Filters the fix is 1.9.7: builds <= 1.9.6 are affected, anything from 1.9.7 onward is not.
Remediation
Update to version 1.9.7, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Filter Everything — WordPress & WooCommerce Filters: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Filter Everything — WordPress & WooCommerce Filters 1.9.7 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C