CVE-2026-6173 Bold Page Builder <= 5.7.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'background_image' Parameter
Authenticated attackers can inject arbitrary scripts via the background_image parameter, executing code when users 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-2026-6173?
CVE-2026-6173 is a medium-severity cross-site scripting vulnerability in boldthemes Bold Page Builder, published on 30 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'background_image' parameter of the plugin's bt_bb_section shortcode in all versions up to, and including, 5.7.2 due to insufficient input sanitization and output escaping on user-supplied attributes. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-6173?
How do I fix CVE-2026-6173?
No fix has been published for CVE-2026-6173 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-2026-6173 being exploited?
There is no known exploitation of CVE-2026-6173 in the wild and no public exploit code.
Sources
Also known as GHSA-8xgh-7m7q-pg6q.