CVE-2026-4334 Shariff Wrapper <= 4.6.20 - Authenticated (Contributor+) Cross-Site Scripting
Authenticated contributors can inject arbitrary scripts via the headline parameter in the Shariff Wrapper 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-2026-4334?
CVE-2026-4334 is a medium-severity cross-site scripting vulnerability in 3uu Shariff Wrapper, published on 28 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Shariff Wrapper plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'headline' parameter in the [shariff] shortcode in all versions up to, and including, 4.6.20 due to insufficient input sanitization and output 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. The vulnerability occurs because the plugin uses a custom wp_kses implementation with permissive allowed HTML tags, and then performs a str_replace operation that injects HTML after sanitization, allowing event handlers to be introduced through the %total placeholder in the style attribute.
Weakness: CWE-79
Which versions are affected by CVE-2026-4334?
How do I fix CVE-2026-4334?
No fix has been published for CVE-2026-4334 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-2026-4334 being exploited?
There is no known exploitation of CVE-2026-4334 in the wild and no public exploit code.
Sources
Also known as GHSA-xp36-f956-vp7p.