CVE-2025-24688

WordPress WP Mailster Plugin <= 1.8.20.0 - Reflected Cross Site Scripting (XSS) vulnerability

Published Feb 14, 2025 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

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 <= 1.8.20.0.

Analysis

Technical impact

The WP Mailster plugin for WordPress contains an improper neutralization of user input during page generation, resulting in a reflected cross‑site scripting (XSS) vulnerability. A malicious user can craft input that is echoed back into the browser, allowing the execution of arbitrary client‑side script when a vulnerable page is rendered.

Affected Systems

The defect affects the WP Mailster plugin (brandtoss:WP Mailster) in all releases up to and including version 1.8.20.0. Any WordPress website that has installed or activated the plugin at or below this version is exposed to the reflected XSS flaw.

Risk and Exploitability

The CVSS score of 7.1 classifies the vulnerability as high, reflecting the potential for client‑side code execution with minimal effort. The EPSS score of <1% signals a low probability of widespread exploitation at present, and the flaw is not listed in the CISA KEV catalog. The likely attack vector is an unauthenticated HTTP request that supplies the malicious input, making the risk real for sites that expose the plugin’s endpoints to unauthenticated or privileged users.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

brandtoss

WP Mailster

unaffected

Version	Status	Constraints
`0`	affected	≤ 1.8.20.0

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade the WP Mailster plugin to a version newer than 1.8.20.0 that removes the reflected XSS flaw.
If an immediate upgrade is not possible, entirely disable or remove the WP Mailster plugin from the WordPress installation to eliminate the attack surface.
As a temporary workaround, restrict access to the plugin’s pages and forms to trusted users only and filter or encode any user‑controlled input that reaches the plugin’s output.

Generated by OpenCVE AI on May 2, 2026 at 11:15 UTC.

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2025-3882	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster allows Reflected XSS. This issue affects WP Mailster: from n/a through 1.8.20.0.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.255% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://patchstack.com/database/Wordpress/Plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-8-20-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

History

Apr 23, 2026 3:00 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}`

Apr 1, 2026 11:45 PM Description updated. References updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster allows Reflected XSS. This issue affects WP Mailster: from n/a through 1.8.20.0.	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 <= 1.8.20.0.
References	https://patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-8-20-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve	https://patchstack.com/database/Wordpress/Plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-8-20-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
Metrics	cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}`

Jul 14, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00032}`	epss `{'score': 0.00035}`

Jul 13, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00072}`	epss `{'score': 0.00032}`

Feb 14, 2025 2:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Feb 14, 2025 1:00 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster allows Reflected XSS. This issue affects WP Mailster: from n/a through 1.8.20.0.
Title		WordPress WP Mailster Plugin <= 1.8.20.0 - Reflected Cross Site Scripting (XSS) vulnerability
Weaknesses		CWE-79
References		https://patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-8-20-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
Metrics		cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}`