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CVE-2026-109370— Document Embedder <= 2.4.0 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via 'documentSource.doc' Block Attribute

Quick assessment

Affected
bplugins Document Embedder – let visitors read files without downloading
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 插件"Document Embedder"（允许访客无需下载插件即可阅读文件）在 2.4.0 及更早的所有版本中存在存储型 DOM 跨站脚本（Stored DOM-Based XSS）漏洞。该漏洞源于对参数 （即包含块级 JSON 的 ，其中包含 ）的输入过滤不足以及输出转义缺失。 拥有“投稿者”（Contributor）及以上权限的已认证攻击者可利用此漏洞，在页面中注入任意 Web 脚本。当用户访问被注入的页面时，这些脚本将被执行。触发该漏洞的具体条件是：受害者点击嵌入文档的“下载”按钮。此时

CVSS 6.4 · Medium
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I. Basic Information for CVE-2026-109370

Vulnerability Information
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Vulnerability Title
Document Embedder <= 2.4.0 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via 'documentSource.doc' Block Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Document Embedder – let visitors read files without downloading plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'content (post_content containing block JSON documentSource.doc)' parameter in all versions up to, and including, 2.4.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is triggered specifically when the victim clicks the embedded document's Download button, which causes the de_track_download AJAX fallback path to programmatically create an anchor with the attacker-controlled href and call .click() — a condition reached because supplying docId=0 causes can_read_document() to return false, bypassing the normal download flow.
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
bplugins Document Embedder – let visitors read files without downloading 0 ~ 2.4.0 -

II. Public POCs for CVE-2026-109370

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III. Intelligence Information for CVE-2026-109370

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Other References for CVE-2026-109370 (7)

IV. Related Vulnerabilities

Same vendor: bplugins
Same weakness: CWE-79