CVE-2026-1543 Avada (Fusion) Builder <= 3.15.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Multiple Shortcodes
Authenticated attackers can inject scripts via shortcodes, potentially compromising administrator accounts when they view affected pages.
- 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-2026-1543?
CVE-2026-1543 is a medium-severity cross-site scripting vulnerability in themefusion Avada (Fusion) Builder, published on 21 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 3.15.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator) accesses a page displaying dynamic user data (such as via the Dynamic Data feature pulling user biographical information).
Weakness: CWE-79
Which versions are affected by CVE-2026-1543?
How do I fix CVE-2026-1543?
No fix has been published for CVE-2026-1543 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-2026-1543 being exploited?
There is no known exploitation of CVE-2026-1543 in the wild and no public exploit code.
Sources
Also known as GHSA-c7gm-xj5j-p869.