CVE-2026-111830 PUBLISHED

WordPress WP Mailster plugin <= 1.9.1.0 - Cross Site Scripting (XSS) vulnerability

Assigner: Patchstack
Reserved: 17.10.2026 Published: 22.10.2026 Updated: 22.10.2026

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Mailster WP Mailster wp-mailster allows Stored XSS.This issue affects WP Mailster: from n/a through 1.9.1.0.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	WP Mailster
Product	WP Mailster
Versions	Default: unaffected affected from 0 to 1.9.1.0 (incl.)

Solutions

Update the WordPress WP Mailster plugin to the latest available version (at least 1.9.2.0).

Credits

V1T | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-9-1-0-cross-site-scripting-xss-vulnerability?_s_id=cve

Problem Types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

Stored XSS