CVE-2026-75017Magazine Blocks <= 1.8.6 - Missing Authorization to Authenticated (Contributor+) Arbitrary Post Modification / Site-Wide Template Takeover via Builder Templates REST Endpoint
Updated under an hour ago ()
Does this affect you?
It affects wpblockart Magazine Blocks – Blog Designer, Magazine & Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wpblockart Magazine Blocks – Blog Designer, Magazine & Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid wpblockart:magazine_blocks_blog_designer_magazine_and_newspaper_website_builder_page_builder_with_posts_blocks_post_grid (from the name) | through 1.8.6 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/7f66d26a-8eb7-4b29-bb7f-afdd762be4b2?source=cve
- https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L56
- https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L116
- https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L138
- https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/MagazineBlocks.php#L98
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3656574%40magazine-blocks&new=3656574%40magazine-blocks
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.