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CVE-2025-24559 WordPress WP Mailster plugin <= 1.8.15.0 - Reflected Cross Site Scripting (XSS) vulnerability

High 7.1 Published Updated

Attackers can execute arbitrary scripts in victim browsers via reflected XSS in the WP Mailster WordPress plugin.

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-2025-24559?

CVE-2025-24559 is a high-severity cross-site scripting vulnerability in brandtoss WP Mailster, published on 3 Feb 2025. 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

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Reflected XSS.This issue affects WP Mailster: from n/a through <= 1.8.15.0.

Weakness: CWE-79

Which versions are affected by CVE-2025-24559?

It affects 1 product.

Products include Wpmailster Wp Mailster.

How do I fix CVE-2025-24559?

No fix has been published for CVE-2025-24559 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-2025-24559 being exploited?

There is no known exploitation of CVE-2025-24559 in the wild and no public exploit code.

Sources

Also known as GHSA-q2rj-w884-9q82.

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