CVE-2026-8865 Cross-site scripting in Avalon23 Products Filter for WooCommerce
Authenticated attackers can inject arbitrary scripts via shortcode attributes in the Avalon23 Products Filter plugin, affecting WordPress sites.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8865?
CVE-2026-8865 is a medium-severity cross-site scripting vulnerability in paradigmatools Avalon23 Products Filter for WooCommerce, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Avalon23 Products Filter for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'avalon23_qr' shortcode in all versions up to, and including, 1.1.6. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes (notably 'title' and 'fixed_link') which are concatenated directly into single-quoted HTML attributes by the AVALON23_HELPER::draw_html_item() helper without esc_attr() or any other encoding. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-8865?
How do I fix CVE-2026-8865?
No fix has been published for CVE-2026-8865 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-2026-8865 being exploited?
There is no known exploitation of CVE-2026-8865 in the wild and no public exploit code.
Sources
Also known as GHSA-hxr4-2fcj-gcw3.