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CVE-2026-111830— WordPress WP Mailster plugin <= 1.9.1.0 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected
WP Mailster WP Mailster
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WP Mailster 插件（wp-mailster）在生成网页时未能正确对用户输入进行中和，存在跨站脚本（Cross-site Scripting, XSS）漏洞，具体为存储型 XSS。该漏洞影响 WP Mailster 从未知版本起至 1.9.1.0 的所有版本。

CVSS 7.1 · High
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I. Basic Information for CVE-2026-111830

Vulnerability Information
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Vulnerability Title
WordPress WP Mailster plugin <= 1.9.1.0 - Cross Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WP Mailster WP Mailster 0 ~ 1.9.1.0 -

II. Public POCs for CVE-2026-111830

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III. Intelligence Information for CVE-2026-111830

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Other References for CVE-2026-111830 (1)

IV. Related Vulnerabilities

Same product: WP Mailster
Same vendor: WP Mailster
Same weakness: CWE-79

V. Comments for CVE-2026-111830

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