CVE-2026-87869 Cross-site scripting in Filter Everything — WordPress & WooCommerce Filters
Unauthenticated attackers can inject arbitrary scripts via crafted links in the Filter Everything plugin, potentially executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-87869?
CVE-2026-87869 is a medium-severity cross-site scripting vulnerability in stepasyuk Filter Everything — WordPress & WooCommerce Filters, published on 10 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-87869?
How do I fix CVE-2026-87869?
No fix has been published for CVE-2026-87869 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-87869 being exploited?
There is no known exploitation of CVE-2026-87869 in the wild and no public exploit code.
Sources
Also known as GHSA-g983-662m-2fg8.