extendthemes Colibri Page Builder Plugin up to 1.0.390 on WordPress Comment colibri.js comment cross site scripting

Summaryinfo

A vulnerability was found in extendthemes Colibri Page Builder Plugin up to 1.0.390. It has been classified as problematic. This affects an unknown function of the file colibri.js of the component Comment Handler. The manipulation of the argument Comment leads to cross site scripting. This vulnerability is referenced as CVE-2026-107758. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in extendthemes Colibri Page Builder Plugin up to 1.0.390. It has been rated as problematic. This issue affects an unknown code block of the file colibri.js of the component Comment Handler. The manipulation of the argument comment with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-107758 since 10/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• extendthemes

Name

• Colibri Page Builder Plugin

Version

• 1.0.390

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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