Vulnerability · Published Sep 19, 2026 · Assigned by Wordfence
CVE-2026-1242BlockSpare - Gutenberg Site Builder Blocks & Starter Sites <= 4.2.6 - Incorrect Authorization to Authenticated (Subscriber+) Arbitrary Post Creation
Medium 4.3
In plain English
A medium-severity incorrect authorization in BlockSpare – Gutenberg Blocks for News, Magazine, Blog & Business Websites from blockspare. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Official description
The BlockSpare plugin for WordPress is vulnerable to authorization bypass due to incorrect logic in the permission callback in all versions up to, and including, 4.2.6 due to the use of an AND (&&) operator instead of an OR (||) operator. This makes it possible for authenticated attackers, with Subscriber-level access and above, to bypass authorization checks and create arbitrary posts.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| blockspare | BlockSpare – Gutenberg Blocks for News, Magazine, Blog & Business Websites | 0 – through 4.2.6 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N