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CVE-2026-75528— Broken Link Checker <= 2.4.13 - Unauthenticated Stored Cross-Site Scripting via Comment Author URL / Link Log

Quick assessment

Affected
wpmudev Broken Link Checker
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“断链检查器”（Broken Link Checker）插件在所有版本（包括 2.4.13 及之前版本）中，由于输入过滤不足和输出转义不当，存在存储型跨站脚本（Stored Cross-Site Scripting）漏洞，影响范围涵盖“评论作者 URL”和“链接日志”。 该漏洞允许未经身份验证的攻击者向将执行脚本的页面注入任意 Web 脚本，只要用户访问了被注入的页面，这些脚本就会执行。 利用此漏洞需要管理员执行插件标准的“忽略并重新检查”工作流，针对攻击者通过 WordPress 评论作者

CVSS 7.2 · High

Possible ATT&CK Techniques 2 AI

T1575 T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-75528

Vulnerability Information
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Vulnerability Title
Broken Link Checker <= 2.4.13 - Unauthenticated Stored Cross-Site Scripting via Comment Author URL / Link Log
Source: CVE Program / CVE List V5
Vulnerability Description
The Broken Link Checker plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author URL / Link Log in all versions up to, and including, 2.4.13 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires an administrator to perform the plugin's standard dismiss-and-recheck workflow on a link submitted by the attacker via the WordPress comment author URL field, after which the attacker's HTTP server issues a redirect to a URL containing an HTML/JavaScript payload that is stored verbatim in the link log.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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
wpmudev Broken Link Checker 0 ~ 2.4.13 -

II. Public POCs for CVE-2026-75528

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III. Intelligence Information for CVE-2026-75528

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Patches & Fixes for CVE-2026-75528 (4)

News Coverage for CVE-2026-75528 (1)

Vendor Pages for CVE-2026-75528 (1)

Other References for CVE-2026-75528 (1)

Other References for CVE-2026-75528 (4)

IV. Related Vulnerabilities

Same product: Broken Link Checker
Same vendor: wpmudev
Same weakness: CWE-79

V. Comments for CVE-2026-75528

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