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CVE PROGRAM SOURCE RECORD6.4 Medium

CVE-2026-77871

Post Snippets <= 4.2.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

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Status
Published
Published
Updated
Assigning organization
Wordfence

Description

The Post Snippets – Custom WordPress Code Snippets Customizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 4.2.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Entity-encoded payloads such as &lt;script&gt;...&lt;/script&gt; survive WordPress's wp_kses_post on-save sanitization because kses does not decode HTML entities, and are only converted back into executable HTML tags at render time by the plugin's own shortcode filter. This requires snippet shortcodes to be enabled.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

saadiqbal Post Snippets – Custom WordPress Code Snippets Customizer

Default version status: unaffected

  • 0 to ≤ 4.2.4affected

References