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CVE-2026-100182— Download Monitor <= 5.2.10 - Unauthenticated Stored Cross-Site Scripting via Cross-Origin postMessage to Admin Editor

Quick assessment

Affected
wpchill Download Monitor
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 Download Monitor 插件在所有 5.2.10 及以下版本中，存在存储型跨站脚本（Stored Cross-Site Scripting, XSS）漏洞。该漏洞源于对输入 sanitization（清理）和输出转义处理不足，允许攻击者通过跨域的 postMessage 通信，向管理员编辑器注入任意网页脚本。一旦用户访问被注入的页面，恶意脚本便会自动执行。 攻击者需诱导已认证的管理员访问一个由攻击者控制的页面，该页面会针对已开放的下载编辑界面发起跨域 postMessage 请求。

CVSS 7.2 · High EPSS 0.31% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpchill Download Monitor ≤ 5.2.10 affected
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I. Basic Information for CVE-2026-100182

Vulnerability Information
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Vulnerability Title
Download Monitor <= 5.2.10 - Unauthenticated Stored Cross-Site Scripting via Cross-Origin postMessage to Admin Editor
Source: CVE Program / CVE List V5
Vulnerability Description
The Download Monitor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Cross-Origin postMessage to Admin Editor in all versions up to, and including, 5.2.10 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. This requires the attacker to trick an authenticated Administrator into visiting an attacker-controlled page that targets an open Download edit screen, after which the payload is persisted unfiltered via the Administrator's unfiltered_html capability and later emitted verbatim to the frontend by the [download_data] shortcode's unescaped post_content render path.
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
wpchill Download Monitor 0 ~ 5.2.10 -

II. Public POCs for CVE-2026-100182

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III. Intelligence Information for CVE-2026-100182

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Patches & Fixes for CVE-2026-100182 (5)

Vendor Advisories for CVE-2026-100182 (1)

IV. Related Vulnerabilities

Same product: Download Monitor
Same vendor: wpchill
Same weakness: CWE-79

V. Comments for CVE-2026-100182

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