CVE-2025-25173 WordPress FastBook plugin <= 1.1 - Cross Site Scripting (XSS) Vulnerability
Stored XSS in FastBook plugin allows attackers to inject malicious scripts, potentially leading to session hijacking or site defacement.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-25173?
CVE-2025-25173 is a high-severity cross-site scripting vulnerability in FasterThemes FastBook, published on 27 Jun 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2025-25173?
How do I fix CVE-2025-25173?
No fix has been published for CVE-2025-25173 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-25173 being exploited?
There is no known exploitation of CVE-2025-25173 in the wild and no public exploit code.
Sources
Also known as GHSA-gggx-m9c6-7fxq.