CVE-2026-7430
MediumCVSS 4.4Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
The Post Snippets plugin for WordPress up to version 4.0.19 is vulnerable to Stored Cross-Site Scripting due to insufficient output escaping of snippet content when rendering JavaScript variables in the post editor, where double quotes are not properly handled. An authenticated attacker with Administrator access can inject malicious scripts via an imported file that execute when any administrator accesses the post editor.
Risk Assessment
An attacker can hijack administrator sessions, steal data, or spread malware within the WordPress environment.
Recommendation
Update the Post Snippets plugin to the latest version that fixes this vulnerability, or temporarily disable the import/export feature for snippets.
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Original NVD description (English source)
The Post Snippets plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 4.0.19. This is due to insufficient output escaping of imported snippet content when rendering JavaScript variables in the post editor. Specifically, the `jqueryUiDialog()` method in `WPEditor.php` embeds snippet content directly into JavaScript string literals without escaping double quotes (the quote-escaping code on line 214 is commented out). When snippets are imported via the Import/Export feature, the content bypasses WordPress's `wp_magic_quotes()` (which would otherwise add protective backslashes), allowing double quotes in snippet content to break out of the JavaScript string context. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via a malicious import file that execute whenever any administrator accesses a post editor page. Please note that this does not affect single-site installations as administrators already have the `unfiltered_html` capability.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

