CVE-2026-3996 WP Games Embed <= 0.1beta - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Authenticated attackers can inject arbitrary scripts via shortcode attributes in the WP Games Embed plugin, affecting WordPress sites.
- 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-2026-3996?
CVE-2026-3996 is a medium-severity cross-site scripting vulnerability in sammyb WP Games Embed, published on 21 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WP Games Embed plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [game] shortcode in all versions up to and including 0.1beta. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes such as 'width', 'height', 'src', 'title', 'description', 'game_url', 'main', and 'thumb', which are all directly concatenated into HTML output without any escaping. 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-2026-3996?
How do I fix CVE-2026-3996?
No fix has been published for CVE-2026-3996 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-2026-3996 being exploited?
There is no known exploitation of CVE-2026-3996 in the wild and no public exploit code.
Sources
Also known as GHSA-4274-9vhj-c283.