CVE-2026-1304 Cross-site scripting in Membership Plugin – Restrict Content
Administrators can inject arbitrary scripts via invoice settings, leading to stored XSS execution for other users.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1304?
CVE-2026-1304 is a medium-severity cross-site scripting vulnerability in stellarwp Membership Plugin – Restrict Content, published on 18 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Membership Plugin – Restrict Content for WordPress is vulnerable to Stored Cross-Site Scripting via multiple invoice settings fields in all versions up to, and including, 3.2.18 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-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-2026-1304?
How do I fix CVE-2026-1304?
No fix has been published for CVE-2026-1304 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-2026-1304 being exploited?
There is no known exploitation of CVE-2026-1304 in the wild and no public exploit code.
Sources
Also known as GHSA-g4wh-mv47-2hg5.