Quick answers
- Is CVE-2026-16654 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-16654 being exploited in the wild.
- How severe is CVE-2026-16654?
- Medium severity, with a CVSS score of 6.4, published 28 August 2026.
- Which products and versions are affected?
- ThemeFusion Avada (Fusion) Builder up to 3.15.6.
- Is there a fix for CVE-2026-16654?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-16654 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-16654?
- Check whether you run ThemeFusion Avada (Fusion) Builder at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a stored cross-site scripting (XSS) flaw in the 'size' shortcode attribute of the Avada plugin that affects all versions up to and including 3.15.6. The root cause is insufficient input sanitization and output escaping; WordPress's wp_kses_post filter does not strip the payload because it resides entirely within a shortcode attribute string containing no HTML angle brackets, allowing the malicious content to persist at save time. An authenticated attacker with contributor-level access or above can inject arbitrary JavaScript that executes in the browser of any user viewing the affected page. A patch is expected in version 3.15.7 or later.
Affected products
- ThemeFusion Avada (Fusion) Builder up to 3.15.6
Timeline
- 2026-08-28: disclosed
- other: Latest Avada version 7.16.1 released 2026-08-25