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CVE-2026-89424— Duplicate Post <= 1.5.6 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'noti_token' Parameter

Quick assessment

Affected
inisev Duplicate Post
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 的 Duplicate Post 插件在包括 1.5.6 在内的所有版本中，由于输入净化不足和输出转义不当，存在通过 参数引发的存储型跨站脚本（Stored XSS）漏洞。这使得拥有订阅者级别或更高权限的已认证攻击者能够向页面中注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本将会执行。该漏洞利用的前提是站点管理员已为“订阅者”角色启用了插件的“用户级别权限”，因为该设置会授予访问 AJAX 分支的权限，而该分支是投递攻击载荷所必需的。

CVSS 6.4 · Medium

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2026-89424

Vulnerability Information
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Vulnerability Title
Duplicate Post <= 1.5.6 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'noti_token' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Duplicate Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'noti_token' parameter in all versions up to, and including, 1.5.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires that the site owner has enabled the plugin's User Level Permissions for the Subscriber role, as this grants access to the i_saw_this_noti AJAX branch needed to deliver the payload.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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
inisev Duplicate Post 0 ~ 1.5.6 -

II. Public POCs for CVE-2026-89424

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III. Intelligence Information for CVE-2026-89424

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Patches & Fixes for CVE-2026-89424 (2)

Vendor Advisories for CVE-2026-89424 (1)

Other References for CVE-2026-89424 (1)

IV. Related Vulnerabilities

Same product: Duplicate Post
Same vendor: inisev
Same weakness: CWE-79

V. Comments for CVE-2026-89424

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