CVE-2026-8875

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.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/aa690c4d-15c4-43bc-b8f7-017b7741c5cd?source=cve
• https://plugins.trac.wordpress.org/browser/easy-prism-syntax-highlighter/trunk/PrismSyntaxHighlither.php#L123
• https://plugins.trac.wordpress.org/browser/easy-prism-syntax-highlighter/trunk/PrismSyntaxHighlither.php#L116

CWEs

CWE-79

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