wpblockart Magazine Blocks Plugin up to 1.8.6 on WordPress REST API save_post authorization

Summaryinfo

A vulnerability categorized as problematic has been discovered in wpblockart Magazine Blocks Plugin up to 1.8.6. The affected element is the function save_post of the component REST API. Executing a manipulation can lead to authorization. This vulnerability is registered as CVE-2026-75017. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in wpblockart Magazine Blocks Plugin up to 1.8.6 and classified as problematic. This vulnerability affects the function save_post of the component REST API. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect integrity, and availability. CVE summarizes:

The Magazine Blocks – Blog Designer, Magazine & Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.8.6. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to demote administrator-owned published builder templates (header, footer, front page, single, archive, 404, and search) to draft status and replace them with attacker-authored block content rendered site-wide, enabling defacement, phishing, and SEO spam. This is possible because the mzb-builder-template post type is registered with capability_type='post' and exposed via the REST API, and the _mzb_template meta key is accessible to any user with edit_posts capability, meaning Contributor-level users and above can trigger the vulnerable save_post() hook.

The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-75017 since 08/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/18/2026).

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• wpblockart

Name

• Magazine Blocks Plugin

Version

• 1.8.0
• 1.8.1
• 1.8.2
• 1.8.3
• 1.8.4
• 1.8.5
• 1.8.6

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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