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

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-03 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

brandtoss WP Mailster: before 1.8.16 — fixed in 1.8.16

How to fix

Upgrade to a fixed version: brandtoss WP Mailster 1.8.16. Check the vendor advisory for mitigations.

References

https://patchstack.com/database/Wordpress/Plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-8-15-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

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