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CVE-2026-15426— AcyMailing <= 10.11.1 - Authenticated (Subscriber+) Missing Authorization to Account Takeover via Notification Template Update

Quick assessment

Affected
acyba AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress
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.

WordPress AcyMailing是WordPress基金会的一款邮件管理与电子邮件安全组件。 WordPress AcyMailing 10.11.1及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于插件未正确验证用户是否授权执行操作，导致授权绕过，可能允许经过身份验证的攻击者（订阅者级别及以上）覆盖acy_notification_cms通知模板的BCC字段，使后续的WordPress密码重置邮件被静默复制到攻击者控制的地址，从而通过捕获的重置链接实现账户接管。

CVSS 8.8 · High EPSS 0.66% · P51

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token

Affected Version Matrix 1

VendorProduct Version RangeStatus
acyba AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress ≤ 10.11.1 affected
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I. Basic Information for CVE-2026-15426

Vulnerability Information
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Vulnerability Title
AcyMailing <= 10.11.1 - Authenticated (Subscriber+) Missing Authorization to Account Takeover via Notification Template Update
Source: CVE Program / CVE List V5
Vulnerability Description
The AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 10.11.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the BCC field of the acy_notification_cms notification template, causing subsequent WordPress password-reset emails — including those targeting administrator accounts — to be silently copied to an attacker-controlled address, enabling account takeover via the captured reset link. Successful exploitation requires the site administrator to have enabled the "Send website emails with AcyMailing" option, which routes WordPress core notification emails through AcyMailing's templating system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress AcyMailing 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress AcyMailing是WordPress基金会的一款邮件管理与电子邮件安全组件。 WordPress AcyMailing 10.11.1及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于插件未正确验证用户是否授权执行操作，导致授权绕过，可能允许经过身份验证的攻击者（订阅者级别及以上）覆盖acy_notification_cms通知模板的BCC字段，使后续的WordPress密码重置邮件被静默复制到攻击者控制的地址，从而通过捕获的重置链接实现账户接管。
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
acyba AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress 0 ~ 10.11.1 -

II. Public POCs for CVE-2026-15426

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III. Intelligence Information for CVE-2026-15426

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Patches & Fixes for CVE-2026-15426 (2)

Security Blog Posts for CVE-2026-15426 (1)

Vendor Pages for CVE-2026-15426 (1)

IV. Related Vulnerabilities

Same product: AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress
Same vendor: acyba
Same weakness: CWE-269

V. Comments for CVE-2026-15426

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