CVE-2025-24598

High

Published: 04 February 2025

Published

04 February 2025

Modified

23 April 2026

KEV Added

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Patch

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CVSS Score 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

EPSS Score 0.0015 34.8th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-24598 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Wpmailster Wp Mailster. Its CVSS base score is 7.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Drive-by Compromise (T1189); ranked at the 34.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).

Threat & Defense at a Glance

What attackers do: exploitation maps to Drive-by Compromise (T1189) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-15 Information Output Filtering good match

prevent

SI-15 mandates information output filtering, directly preventing reflected XSS in WP Mailster by neutralizing malicious inputs during web page generation.

SI-10 Information Input Validation good match

prevent

SI-10 requires validation of information inputs, addressing the improper neutralization vulnerability in WP Mailster that enables unauthenticated reflected XSS attacks.

SI-2 Flaw Remediation good match

prevent

SI-2 ensures flaw remediation through timely patching of the specific XSS vulnerability affecting WP Mailster versions up to 1.8.17.0.

MITRE ATT&CK Enterprise TechniquesAI

T1189 Drive-by Compromise Initial Access

Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.

attack.mitre.org →

T1566.002 Spearphishing Link Initial Access

Adversaries may send spearphishing emails with a malicious link in an attempt to gain access to victim systems.

attack.mitre.org →

Why these techniques?

Reflected XSS in public-facing WordPress plugin enables drive-by compromise via crafted URLs (T1189) typically delivered through spearphishing links (T1566.002) requiring user interaction.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

NVD 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 <= 1.8.17.0.

Deeper analysisAI

CVE-2025-24598 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the WP Mailster WordPress plugin by brandtoss. This issue affects WP Mailster versions from n/a through 1.8.17.0.

An unauthenticated attacker (PR:N) can exploit this over the network (AV:N) with low attack complexity (AC:L), requiring user interaction such as clicking a malicious link (UI:R). Exploitation results in a changed scope (S:C), enabling limited impacts on confidentiality, integrity, and availability (C:L/I:L/A:L), with an overall CVSS v3.1 score of 7.1.

Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-8-17-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve. The CVE was published on 2025-02-04T15:15:23.027.