CVE-2026-15101 WPBakery Page Builder <= 8.7.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'data' Parameter
Authenticated attackers can inject arbitrary scripts via the data parameter, leading to stored XSS execution for other users.
- 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-2026-15101?
CVE-2026-15101 is a medium-severity cross-site scripting vulnerability in WPBakery Page Builder, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WPBakery Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'data' parameter in all versions up to, and including, 8.7.4 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 accesses an injected page. The wp_kses_post sanitization applied during save does not neutralize the payload because the malicious script content is base64-encoded as plain alphanumeric text with no HTML tags to strip; the vc_raw_html shortcode template then decodes and echoes this content unescaped at render time.
Weakness: CWE-79
Which versions are affected by CVE-2026-15101?
How do I fix CVE-2026-15101?
No fix has been published for CVE-2026-15101 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-2026-15101 being exploited?
There is no known exploitation of CVE-2026-15101 in the wild and no public exploit code.
Sources
Also known as GHSA-pvfv-gmj3-wwvh.