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CVE-2026-81764— WordPress Email Essentials plugin <= 6.0.6 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected
Acato Email Essentials
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.

Acato Email Essentials是Acato组织的一款电子邮件系统软件。 Acato Email Essentials 6.0.6及之前版本存在跨站脚本漏洞，该漏洞源于程序对用户输入验证不足，导致未经身份验证的攻击者可以实施跨站脚本攻击。

CVSS 7.1 · High EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
Acato Email Essentials n/a≤ 6.0.6 affected
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I. Basic Information for CVE-2026-81764

Vulnerability Information
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Vulnerability Title
WordPress Email Essentials plugin <= 6.0.6 - Cross Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated Cross Site Scripting (XSS) in Email Essentials <= 6.0.6 versions.
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
Vulnerability Title
Acato Email Essentials 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Acato Email Essentials是Acato组织的一款电子邮件系统软件。 Acato Email Essentials 6.0.6及之前版本存在跨站脚本漏洞，该漏洞源于程序对用户输入验证不足，导致未经身份验证的攻击者可以实施跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Acato Email Essentials n/a ~ 6.0.6 -

II. Public POCs for CVE-2026-81764

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III. Intelligence Information for CVE-2026-81764

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Vendor Advisories for CVE-2026-81764 (1)

IV. Related Vulnerabilities

Same vendor: Acato
Same weakness: CWE-79

V. Comments for CVE-2026-81764

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