CVE-2026-3896 Livemesh SiteOrigin Widgets <= 3.9.2 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting
Authenticated subscribers can inject malicious scripts via missing authorization checks, leading to code execution and potential privilege escalation.
- 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-2026-3896?
CVE-2026-3896 is a medium-severity missing authorization vulnerability in Livemesh SiteOrigin Widgets, published on 27 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Livemesh SiteOrigin Widgets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `lsow_admin_ajax` AJAX action in all versions up to, and including, 3.9.2 due to missing authorization checks and insufficient input sanitization. The AJAX handler verifies a nonce but does not check user capabilities. This makes it possible for authenticated attackers with Subscriber-level access and above to modify plugin settings and inject malicious scripts that execute when administrators access the plugin settings page or when any user visits the frontend.
Weakness: CWE-862
Which versions are affected by CVE-2026-3896?
How do I fix CVE-2026-3896?
No fix has been published for CVE-2026-3896 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-3896 being exploited?
There is no known exploitation of CVE-2026-3896 in the wild and no public exploit code.
Sources
Also known as GHSA-6jw7-72vv-cg3r.