CVE-2025-3527 Cross-site scripting in EventON (Pro) - WordPress Virtual Event Calendar Plugin

Medium 6.4 Published 17 May 2025 Updated 8 Apr 2026

Authenticated subscribers can inject arbitrary scripts via missing capability checks, leading to stored XSS attacks against 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-2025-3527?

CVE-2025-3527 is a medium-severity cross-site scripting vulnerability in EventON (Pro) - WordPress Virtual Event Calendar Plugin, published on 17 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The EventON Pro plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check in the 'assets/lib/settings/settings.js' file in all versions up to, and including, 4.9.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability was partially patched in version 4.9.6.

Weakness: CWE-862

Which versions are affected by CVE-2025-3527?

It affects 1 product.

Products include Myeventon Eventon.

How do I fix CVE-2025-3527?

No fix has been published for CVE-2025-3527 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-2025-3527 being exploited?

There is no known exploitation of CVE-2025-3527 in the wild and no public exploit code.

Sources

Also known as GHSA-4fg5-cfp9-9q4x.