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CVE-2025-10139: WP BookWidgets <= 0.9 - Authenticated (Contributor+) Stored Cross-Site Scripting

• 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: 2025-10-15 · updated 2026-10-08
• Weakness: CWE-79

Description

The WP BookWidgets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'bw_link' shortcode in all versions up to, and including, 0.9 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

• remko WP BookWidgets: through 0.9

References

• https://plugins.trac.wordpress.org/browser/wp-bookwidgets/trunk/wp-bookwidgets.php#L163
• https://plugins.trac.wordpress.org/changeset/3380322/
• https://wordpress.org/plugins/wp-bookwidgets
• https://www.wordfence.com/threat-intel/vulnerabilities/id/1716743f-8259-40fb-bc9b-53e3dfef8816?source=cve

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