CVE-2026-16758: Snippet Shortcodes <= 5.2.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-16 · updated 2026-08-20
Weakness: CWE-79

Description

The Snippet Shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 5.2.0 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.

Affected products

aliakro Snippet Shortcodes: through 5.2.0

References

https://plugins.trac.wordpress.org/browser/shortcode-variables/tags/5.1.7/includes/functions.php#L81
https://plugins.trac.wordpress.org/browser/shortcode-variables/tags/5.1.7/includes/shortcode.user.php#L14
https://plugins.trac.wordpress.org/browser/shortcode-variables/tags/5.1.7/includes/shortcode.user.php#L74
https://plugins.trac.wordpress.org/changeset?reponame=&old=3647346%40shortcode-variables&new=3647346%40shortcode-variables
https://www.wordfence.com/threat-intel/vulnerabilities/id/6dd14860-2cf5-45ec-a1d6-69e43ecdb3be?source=cve

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