Vulnerability · Published Nov 17, 2021 · Assigned by Wordfence
CVE-2021-42360Starter Templates — Elementor, Gutenberg & Beaver Builder Templates <= 2.7.0 Authenticated Block Import to Stored XSS
High 7.6
In plain English
A high-severity improper access control in Starter Templates — Elementor, Gutenberg & Beaver Builder Templates from BrainStormForce. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).
Official description
On sites that also had the Elementor plugin for WordPress installed, it was possible for users with the edit_posts capability, which includes Contributor-level users, to import blocks onto any page using the astra-page-elementor-batch-process AJAX action. An attacker could craft and host a block containing malicious JavaScript on a server they controlled, and then use it to overwrite any post or page by sending an AJAX request with the action set to astra-page-elementor-batch-process and the url parameter pointed to their remotely-hosted malicious block, as well as an id parameter containing the post or page to overwrite. Any post or page that had been built with Elementor, including published pages, could be overwritten by the imported block, and the malicious JavaScript in the imported block would then be executed in the browser of any visitors to that page.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| BrainStormForce | Starter Templates — Elementor, Gutenberg & Beaver Builder Templates | 2.7.0 – through 2.7.0 |
Weakness: CWE-284, CWE-79, CWE-99 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L