CVE-2026-84021 Bold Page Builder < 5.9.8 - Contributor+ Stored XSS via bt_bb_button/bt_bb_headline/bt_bb_icon URL
Contributors can inject arbitrary scripts via URL fields in Bold Page Builder, leading to code execution when links are clicked.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-84021?
CVE-2026-84021 is a medium-severity cross-site scripting vulnerability in Unknown Bold Page Builder, published on 5 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Bold Page Builder WordPress plugin before 5.9.8 does not properly validate a link URL before outputting it in an HTML attribute, relying on a filter that can be evaded, allowing users with the Contributor role and above to inject arbitrary web scripts that execute when a user clicks the affected link.
Weakness: CWE-79
Which versions are affected by CVE-2026-84021?
How do I fix CVE-2026-84021?
No fix has been published for CVE-2026-84021 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-2026-84021 being exploited?
There is no known exploitation of CVE-2026-84021 in the wild and no public exploit code.
Sources
Also known as GHSA-v5jf-q9wj-fxfx.