CVE-2026-3600 Cross-site scripting in Investi
Authenticated attackers with Contributor access can inject arbitrary scripts via the Investi plugin's shortcode attribute, 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-2026-3600?
CVE-2026-3600 is a medium-severity cross-site scripting vulnerability in Investi, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Investi plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'investi-announcements-accordion' shortcode's 'maximum-num-years' attribute in all versions up to, and including, 1.0.26. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, the 'maximum-num-years' attribute value is read directly from shortcode attributes and interpolated into a double-quoted HTML attribute without any escaping (no esc_attr(), htmlspecialchars(), or similar). 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-2026-3600?
How do I fix CVE-2026-3600?
No fix has been published for CVE-2026-3600 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-2026-3600 being exploited?
There is no known exploitation of CVE-2026-3600 in the wild and no public exploit code.
Sources
Also known as GHSA-rcpv-9747-gv3q.