CVE-2026-107758 Colibri Page Builder <= 1.0.390 - Unauthenticated Stored Cross-Site Scripting via Comments
Unauthenticated attackers can inject arbitrary scripts via comments in Colibri Page Builder, leading to code execution when users view the page.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107758?
CVE-2026-107758 is a high-severity cross-site scripting vulnerability in extendthemes Colibri Page Builder, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Colibri Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 1.0.390 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload survives storage because the widened comment allow-list permits SVG elements with arbitrary data-* attributes; execution occurs because colibri.js, enqueued globally on every front-end page, reads the stored data-target value via jQuery.data() — which HTML-entity-decodes it — and passes the resulting string directly into jQuery(), which parses a leading '<' as HTML and fires the embedded event handler.
Weakness: CWE-79
Which versions are affected by CVE-2026-107758?
How do I fix CVE-2026-107758?
No fix has been published for CVE-2026-107758 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-2026-107758 being exploited?
There is no known exploitation of CVE-2026-107758 in the wild and no public exploit code.
Sources
Also known as GHSA-j6m3-8cm2-pm6p.