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CVE-2024-11766: WordPress Book Plugin for Displaying Books in Grid, Flip, Slider, Popup Layout and more <= 1.3.1 - Authenticated (Contributor+) Stored Cross-Site Scripting

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-12 · updated 2026-06-17
• Weakness: CWE-79

Description

The WordPress Book Plugin for Displaying Books in Grid, Flip, Slider, Popup Layout and more plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'gs_book_showcase' shortcode in all versions up to, and including, 1.3.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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

• samdani GS Books Showcase – Display Books in Grid, Slider & More | Library for WordPress: through 1.3.1

References

• https://plugins.trac.wordpress.org/browser/gs-books-showcase/tags/1.3.1/gs-bookshowcase-files/includes/templates/gs_bookshowcase_structure_1_square.php#L24
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3204642%40gs-books-showcase&new=3204642%40gs-books-showcase&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/b3b40b73-4dec-4a96-a634-3bd3d74616ba?source=cve

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