CVE-2026-13441 EventPrime <= 4.3.4.2 - Unauthenticated Stored Cross-Site Scripting via 'new_event_type_background_color' Parameter

Q: What is CVE-2026-13441?

CVE-2026-13441 is a high-severity cross-site scripting vulnerability in metagauss EventPrime – Events Calendar, Bookings and Tickets, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Q: Is CVE-2026-13441 being exploited?

There is no known exploitation of CVE-2026-13441 in the wild and no public exploit code.

Q: How do I fix CVE-2026-13441?

No fix has been published for CVE-2026-13441 yet. Limit exposure of the affected software until one is available.

High 7.2 Published 9 Jul 2026 Updated 9 Jul 2026

Authenticated attackers can inject arbitrary scripts via the background color parameter, potentially leading to session hijacking or malicious actions on behalf of other users.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-13441?

CVE-2026-13441 is a high-severity cross-site scripting vulnerability in metagauss EventPrime – Events Calendar, Bookings and Tickets, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.

Weakness: CWE-79

Which versions are affected by CVE-2026-13441?

How do I fix CVE-2026-13441?

No fix has been published for CVE-2026-13441 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-2026-13441 being exploited?