CVE-2026-15402 Cross-site scripting in Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
Authenticated attackers can inject arbitrary scripts via the schedule_slot parameter, leading to stored XSS execution for other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15402?
CVE-2026-15402 is a medium-severity cross-site scripting vulnerability in arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'etn_shedule_objective' schedule_slot Parameter in all versions up to, and including, 4.1.23 due to insufficient input sanitization and output escaping. 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-15402?
How do I fix CVE-2026-15402?
No fix has been published for CVE-2026-15402 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-2026-15402 being exploited?
There is no known exploitation of CVE-2026-15402 in the wild and no public exploit code.
Sources
Also known as GHSA-mcqc-q4hw-vwgg.