CVE-2025-25173: WordPress FastBook plugin <= 1.1 - Cross Site Scripting (XSS) Vulnerability

Severity: high (CVSS 7.1 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: 2025-06-27 · updated 2026-06-17
Weakness: CWE-79

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in FasterThemes FastBook fastbook-responsive-appointment-booking-and-scheduling-system allows Stored XSS.This issue affects FastBook: from n/a through <= 1.1.

Affected products

FasterThemes FastBook: through 1.1

References

https://patchstack.com/database/Wordpress/Plugin/fastbook-responsive-appointment-booking-and-scheduling-system/vulnerability/wordpress-fastbook-1-1-cross-site-scripting-xss-vulnerability?_s_id=cve

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