CVE-2026-5391: latepoint appointment booking plugin – latepoint | calendar & scheduling for wordpress Cross-site Scripting

Vulnerability summary

CVE-2026-5391 is a medium (CVSS 6.4) Cross-site Scripting vulnerability in latepoint appointment booking plugin – latepoint | calendar & scheduling for wordpress. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16.8% of scored vulnerabilities. Fixed in 5.4.0.

Timeline

1. 06-08-2026
   PublishedVulnerability first disclosed.
2. 06-08-2026
   Last modifiedVulnerability information updated.

Description

The LatePoint plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'btn_wrapper_classes' attribute of the 'latepoint_resources' shortcode in all versions up to, and including, 5.3.2. This is due to insufficient input sanitization and output escaping in the 'locations' branch of the 'shortcode_latepoint_resources' 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.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.