CVE-2026-84281 Cross-site scripting in Fancy Product Designer
Unauthenticated attackers can inject arbitrary scripts via product titles in Fancy Product Designer, leading to code execution or account takeover when admins view orders.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84281?
CVE-2026-84281 is a high-severity cross-site scripting vulnerability in radykal Fancy Product Designer, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Fancy Product Designer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'productTitle' in '_fpd_data' Order Item Meta in all versions up to, and including, 6.5.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The fpd_save_order AJAX action is registered for unauthenticated users via wp_ajax_nopriv_fpd_save_order with no nonce or capability check, and the strip_tags() sanitization applied at save time is bypassed by submitting JSON unicode escape sequences (e.g. \u003c, \u003e), which json_decode() silently converts back to literal angle brackets when the order is rendered in the admin view.
Weakness: CWE-79
Which versions are affected by CVE-2026-84281?
How do I fix CVE-2026-84281?
No fix has been published for CVE-2026-84281 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-2026-84281 being exploited?
There is no known exploitation of CVE-2026-84281 in the wild and no public exploit code.
Sources
Also known as GHSA-4wqf-6xrq-qp4m.