CVE-2026-8875
Deferred Deferred - Pending Action
Stored Cross-Site Scripting in Easy Prism Syntax Highlighter WordPress Plugin

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: Wordfence

Description
The Easy Prism Syntax Highlighter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'code' (and 'c') shortcode in versions up to, and including, 1.0.2. This is due to insufficient input sanitization and output escaping on user supplied shortcode attributes in the shortcode() function, which concatenates the first positional attribute directly into the class attribute of the generated <pre>/<code> HTML without calling esc_attr() or any other escaping function. 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.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-8875
EUVD
EUVD-2026-32083
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
easy_prism syntax_highlighter to 1.0.2 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

The Easy Prism Syntax Highlighter plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in its 'code' and 'c' shortcodes in versions up to and including 1.0.2.

This vulnerability arises because the plugin does not properly sanitize or escape user-supplied shortcode attributes before inserting them into the HTML class attribute of the generated <pre>/<code> elements.

As a result, authenticated users with contributor-level access or higher can inject arbitrary malicious scripts that will execute whenever any user views the affected page.

Impact Analysis

This vulnerability can allow attackers with contributor-level access to inject malicious scripts into pages on a WordPress site.

When other users visit these pages, the injected scripts will execute in their browsers, potentially leading to theft of sensitive information, session hijacking, or other malicious actions.

Because the vulnerability requires authenticated access, it primarily impacts sites where contributors or higher roles are not fully trusted or where user permissions are not tightly controlled.

Compliance Impact

The vulnerability allows authenticated attackers with contributor-level access to inject arbitrary web scripts via stored cross-site scripting (XSS). This can lead to unauthorized access to user data or session hijacking, which may result in violations of data protection regulations such as GDPR or HIPAA that require safeguarding personal and sensitive information.

Specifically, the insufficient input sanitization and output escaping in the Easy Prism Syntax Highlighter plugin could enable attackers to execute malicious scripts in the context of other users, potentially exposing personal data or compromising system integrity.

Therefore, organizations using affected versions of this plugin may face compliance risks if the vulnerability is exploited, as it undermines the security controls required by common standards and regulations.

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