CVE-2025-31883 WordPress WebinarPress plugin <= 1.33.28 - Cross Site Scripting (XSS) vulnerability

What is CVE-2025-31883?

CVE-2025-31883 is a medium-severity cross-site scripting vulnerability in WPWebinarSystem WebinarPress, published on 1 Apr 2025. An attacker needs administrator access to exploit it, 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 WPWebinarSystem WebinarPress wp-webinarsystem allows Stored XSS.This issue affects WebinarPress: from n/a through <= 1.33.28.

Weakness: CWE-79

Which versions are affected by CVE-2025-31883?

It affects 1 product.

Products include Webinarpress Webinarpress.

How do I fix CVE-2025-31883?

No fix has been published for CVE-2025-31883 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-2025-31883 being exploited?

There is no known exploitation of CVE-2025-31883 in the wild and no public exploit code.

Other vulnerabilities in WPWebinarSystem WebinarPress

• CVE-2024-11270 Missing authorization in WebinarPress – Webinar System for WordPress High 8.8
• CVE-2024-11271 Missing authorization in WebinarPress – Webinar System for WordPress High 8.8
• CVE-2025-47635 WordPress WebinarPress plugin <= 1.33.28 - Server Side Request Forgery (SSRF) Vulnerability Medium 5.5
• CVE-2024-43339 WordPress WordPress Webinar Plugin – WebinarPress plugin <= 1.33.20 - Cross Site Request Forgery (CSRF) vulnerability Medium 5.4
• CVE-2025-32693 WordPress WebinarPress plugin <= 1.33.28 - Open Redirection Vulnerability Medium 4.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jpj3-4vjw-5jmq.