
Post Grid Gutenberg Blocks – PostX Security & Risk Analysis
wordpress.org/plugins/ultimate-postDesign professional blogs with advanced Gutenberg blocks, premade templates, dynamic post grids, and smart filters.
Is Post Grid Gutenberg Blocks – PostX Safe to Use in 2026?
Generally Safe
Score 88/100Post Grid Gutenberg Blocks – PostX has a strong security track record. Known vulnerabilities have been patched promptly. It's a solid choice for most WordPress installations.
The 'ultimate-post' plugin version 5.0.11 presents a mixed security posture. While it demonstrates good practices such as extensive use of prepared statements for SQL queries (95%) and a high rate of proper output escaping (84%), significant concerns arise from its attack surface. A large number of entry points, specifically 34 out of 52, lack proper authentication or permission checks. This includes a substantial portion of its REST API routes (31 without permission callbacks) and several AJAX handlers (3 without auth checks), creating numerous potential avenues for unauthorized access and exploitation.
The historical vulnerability data is a major red flag, with a staggering 23 known CVEs, 6 of which are high severity. The common vulnerability types, including SSRF, Information Exposure, Improper Privilege Management, Missing Authorization, and XSS, directly correlate with the identified weaknesses in the static analysis, particularly the lack of robust authorization checks on entry points. The fact that the last vulnerability was as recent as March 2026, even though it is marked as unpatched (which contradicts the '0 unpatched' data point and suggests a potential data inconsistency or a future vulnerability already accounted for), indicates a recurring pattern of security flaws within the plugin. While the current static analysis did not reveal critical taint flows or dangerous functions, the historical context and the exposed attack surface are serious indicators of potential risk.
In conclusion, despite some commendable secure coding practices, the 'ultimate-post' plugin has a history of significant security issues and possesses a large, unprotected attack surface. This combination makes it a high-risk plugin that requires immediate attention. Developers should prioritize auditing and securing all AJAX handlers and REST API routes, and users should be extremely cautious when deploying this version.
Key Concerns
- Large attack surface without authorization
- Unprotected AJAX handlers
- Unprotected REST API routes
- High number of historical CVEs
- High severity historical CVEs
- Common vulnerability types indicating authorization issues
- Recent vulnerability detected
Post Grid Gutenberg Blocks – PostX Security Vulnerabilities
CVEs by Year
Severity Breakdown
25 total CVEs
Post Grid Gutenberg Blocks for News, Magazines, Blog Websites <= 5.0.31 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'moreResultsText' Block Attribute
Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX <= 5.0.5 - Missing Authorization to Limited Post Meta Modification
PostX <= 5.0.8 - Authenticated (Administrator+) Server-Side Request Forgery via REST API Endpoints
PostX <= 5.0.3 - Missing Authorization
PostX <= 5.0.3 - Unauthenticated Information Exposure
Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX <= 5.0.3 - Missing Authorization to Unauthenticated Sensitive Information Exposure
PostX <= 4.1.36 - Missing Authorization
PostX <= 4.1.35 - Authenticated (Editor+) Privilege Escalation
PostX <= 4.1.25 - Authenticated (Contributor+) Stored Cross-Site Scripting
PostX <= 4.1.15 - Authenticated (Contributor+) Stored Cross-Site Scripting
PostX <= 4.1.16 - Missing Authorization to Arbitrary Plugin Installation/Activation
PostX <= 4.1.15 - Authenticated (Author+) Stored Cross-Site Scripting
PostX <= 4.1.12 - Authenticated (Contributor+) Stored Cross-Site Scripting
Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX <= 4.1.1 - Authenticated (Author+) Stored Cross-Site Scripting
Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX <= 4.1.2 - Missing Authorization to Arbitrary Options Update
Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX <= 4.0.4 - Authenticated (Contributor+) Stored Cross=Site Scripting
Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX <= 4.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting
Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX <= 4.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting
PostX – Gutenberg Blocks for Post Grid <= 3.2.3 - Incorrect Authorization
PostX - Gutenberg Post Grid Blocks <= 3.0.5 - Reflected Cross-Site Scripting via 'postx_type'
PostX – Gutenberg Blocks for Post Grid <= 2.9.9 - Unauthenticated Cross-Site Scripting
PostX - Gutenberg Blocks for Post Grid <= 2.4.9 - Authenticated (Contributor+) Stored Cross-Site Scripting
PostX - Gutenberg Blocks for Post Grid <= 2.4.9 - Stored Cross-Site Scripting
PostX Gutenberg Blocks Saved Templates Addon <= 2.4.9 - Private Content Disclosure
PostX - Gutenberg Blocks for Post Grid <= 2.4.9 - Unauthorized Access Controls
Post Grid Gutenberg Blocks – PostX Release Timeline
Post Grid Gutenberg Blocks – PostX Code Analysis
SQL Query Safety
Output Escaping
Data Flow Analysis
Post Grid Gutenberg Blocks – PostX Attack Surface
AJAX Handlers 17
REST API Routes 32
Shortcodes 3
WordPress Hooks 124
Maintenance & Trust
Post Grid Gutenberg Blocks – PostX Maintenance & Trust
Maintenance Signals
Community Trust
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Post Grid Gutenberg Blocks – PostX Developer Profile
11 plugins · 53K total installs
How We Detect Post Grid Gutenberg Blocks – PostX
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/ultimate-post/assets/css/frontend.css/wp-content/plugins/ultimate-post/assets/js/frontend.js/wp-content/plugins/ultimate-post/assets/js/frontend.jsultimate-post/assets/css/frontend.css?ver=ultimate-post/assets/js/frontend.js?ver=HTML / DOM Fingerprints
ultp-builderid-ultp-blockdata-ultp-block-idULTPultp_data/wp-json/ultp/v1/get_posts[ultp_posts][ultp_author_box]