rootpwn

medium · CVSS v3 4.3 · EPSS 0.00177

CVE-2026-1242

The BlockSpare plugin for WordPress has an authorization bypass that allows authenticated users with Subscriber-level access to create arbit

Overview

The BlockSpare plugin for WordPress has an authorization bypass that allows authenticated users with Subscriber-level access to create arbitrary posts. This flaw stems from incorrect permission logic using AND instead of OR. It enables content injection without proper privileges.

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.

Impact

Confidentiality: unauthorized content creation could expose sensitive information. Integrity: attacker can alter site content. Availability: minimal direct impact but could lead to site compromise. Defenders: site administrators and WordPress users.

Remediation

Update the BlockSpare plugin to version 4.2.7 or later. If update is not possible, remove the plugin or restrict Subscriber-level capabilities. Monitor the site for unexpected post creation and review user roles.

Risk context

The vulnerability has a medium severity score (CVSS 4.3) and a very low EPSS (0.00177), indicating limited exploitation likelihood, but defenders should still address it promptly.

Affected products

  • WordPress BlockSpare
  • WordPress

Scores

Severity
medium
CVSS v2
4
CVSS v3
4.3
CVSS v4
—
EPSS
0.00177

wordpress plugin authorization-bypass subscriber content-injection medium-severity

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