CVE-2025-13893: Lesson Plan Book <= 1.3 - Reflected Cross-Site Scripting

Severity: medium (CVSS 6.1 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: 2026-01-09 · updated 2026-06-17
Weakness: CWE-79

Description

The Lesson Plan Book plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `$_SERVER['PHP_SELF']` variable in all versions up to, and including, 1.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Affected products

burtrw Lesson Plan Book: through 1.3

References

https://plugins.trac.wordpress.org/browser/lesson-plan-book/trunk/lesson.php#L1776
https://plugins.trac.wordpress.org/browser/lesson-plan-book/trunk/lesson.php#L1910
https://plugins.trac.wordpress.org/browser/lesson-plan-book/trunk/lesson.php#L719
https://www.wordfence.com/threat-intel/vulnerabilities/id/18696937-5cc5-4e14-940d-fc25468377a3?source=cve

Get alerted when CVE-2025-13893 or the next vulnerability affects your stack