CVE-2026-59558 WordPress Booking Calendar plugin <= 11.4.2 - Cross Site Scripting (XSS) vulnerability
Unauthenticated attackers can inject malicious scripts into the Booking Calendar plugin, potentially compromising user sessions or site integrity.
- 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-2026-59558?
CVE-2026-59558 is a high-severity cross-site scripting vulnerability in wpdevelop Booking Calendar, published on 27 Jul 2026. 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
Unauthenticated Cross Site Scripting (XSS) in Booking Calendar <= 11.4.2 versions.
Weakness: CWE-79
Which versions are affected by CVE-2026-59558?
How do I fix CVE-2026-59558?
No fix has been published for CVE-2026-59558 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-2026-59558 being exploited?
There is no known exploitation of CVE-2026-59558 in the wild and no public exploit code.
Sources
Also known as GHSA-45v6-jjpf-7xvm.