Reported vulnerability

Post Snippets <= 4.0.19 - Authenticated (Administrator+) Stored Cross-Site Scripting via Import

Q: Which versions of Post Snippets – Custom WordPress Code Snippets Customizer are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.0.19. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Post Snippets – Custom WordPress Code Snippets Customizer?

Wordfence reports a fix for this issue in Post Snippets – Custom WordPress Code Snippets Customizer. It lists these fixed versions: 4.1.1. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 28 May 2026

Updated 29 May 2026

CVE-2026-7430

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 4.4

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.

Severity vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Post Snippets – Custom WordPress Code Snippets Customizer

Software: plugin · post-snippets
Affected versions: Start version unspecified, through 4.0.19
Fix availability: Fix available
Fixed versions: 4.1.1

Recommended action

Update to version 4.1.1, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/59dc2448-491c-478f-a784-c727057b126b?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of Post Snippets – Custom WordPress Code Snippets Customizer are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.0.19. Use the version checker above to compare your installed release with this report.

Is a fix available for Post Snippets – Custom WordPress Code Snippets Customizer?

Wordfence reports a fix for this issue in Post Snippets – Custom WordPress Code Snippets Customizer. It lists these fixed versions: 4.1.1. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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