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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 Broken Link Checker是WordPress基金会开源的一款检查网站损坏链接的CMS插件。 WordPress Broken Link Checker 2.4.13及之前版本存在跨站脚本漏洞，该漏洞源于对Comment Author URL / Link Log的输入清理和输出转义不足，可能导致未经身份验证的攻击者注入任意Web脚本，当用户访问被注入页面时执行。

CVSS 7.2 · High EPSS 0.30% · P23

Possible ATT&CK Techniques 2 AI

T1575 T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpmudev Broken Link Checker ≤ 2.4.13 affected
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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
Vulnerability Title
WordPress Broken Link Checker 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Broken Link Checker是WordPress基金会开源的一款检查网站损坏链接的CMS插件。 WordPress Broken Link Checker 2.4.13及之前版本存在跨站脚本漏洞，该漏洞源于对Comment Author URL / Link Log的输入清理和输出转义不足，可能导致未经身份验证的攻击者注入任意Web脚本，当用户访问被注入页面时执行。
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
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 (2)

Other References for CVE-2026-75528 (1)

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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