CVE-2026-10089 Insert Pages <= 3.11.4 - Authenticated (Author+) Stored Cross-Site Scripting via Custom Field Keys (Meta Key Names)
Authenticated attackers with author-level access can inject arbitrary scripts via custom field keys in the Insert Pages plugin, leading to stored XSS.
- 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-2026-10089?
CVE-2026-10089 is a medium-severity cross-site scripting vulnerability in figureone Insert Pages, published on 2 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Insert Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via post custom field keys (meta key names) in all versions up to, and including, 3.11.4. This is due to insufficient output escaping in the the_meta() function: while the custom field VALUE is sanitized with wp_kses_post(), the custom field KEY ($key) is interpolated into the rendered HTML (lines 1786-1791) and echoed (line 1806) without any escaping when an inserted page is rendered with the [insert page='ID' display='all'] shortcode. This makes it possible for authenticated attackers, with author-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-2026-10089?
How do I fix CVE-2026-10089?
No fix has been published for CVE-2026-10089 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-2026-10089 being exploited?
There is no known exploitation of CVE-2026-10089 in the wild and no public exploit code.
Sources
Also known as GHSA-6x9h-hg2c-hwf8.