CVE-2026-14921 Ultimate Addons for WPBakery Page Builder < 3.21.5 - Contributor+ Stored XSS via ult_buttons Shortcode
Contributors can inject malicious scripts via the ult_buttons shortcode, potentially leading to code execution or account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-14921?
CVE-2026-14921 is a medium-severity cross-site scripting vulnerability in Unknown Ultimate Addons for WPBakery Page Builder, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Ultimate Addons for WPBakery Page Builder WordPress plugin before 3.21.5's shared link-rendering function, Ultimate_VC_Addons::uavc_link_init(),
Weakness: CWE-79
Which versions are affected by CVE-2026-14921?
How do I fix CVE-2026-14921?
No fix has been published for CVE-2026-14921 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-2026-14921 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14921 exists.
Sources
Also known as GHSA-5rjg-8878-gjp3.