CVE-2020-4046— Authenticated XSS through embed block in WordPress
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I. Basic Information for CVE-2020-4046
Vulnerability Information
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Vulnerability Title
Authenticated XSS through embed block in WordPress
Source: NVD (National Vulnerability Database)
Vulnerability Description
In affected versions of WordPress, users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress是WordPress基金会的一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。 WordPress中存在跨站脚本漏洞。该漏洞源于WEB应用缺少对客户端数据的正确验证。攻击者可利用该漏洞执行客户端代码。以下产品及版本受到影响：WordPress 5.3.4版本，5.2.7版本，5.1.6版本，5.0.10版本，4.9.15版本，4.8.14版本，4.7.18， 4.6.19版本，4.5.22版本，4.4.23版本，4.3.24版本，4.2.28版本
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 |
|---|---|---|---|---|
| WordPress | wordpress-develop | >= 5.4.0, < 5.4.2 | - |
II. Public POCs for CVE-2020-4046
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
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- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/773N2ZV7QEMBGKH6FBKI6Q5S3YJMW357/vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2020-4046
Same Patch Batch · WordPress · 2020-06-12 · 5 CVEs total
| CVE-2020-4047 | 6.8 MEDIUM | Authenticated XSS via media attachment page in WordPress |
| CVE-2020-4048 | 5.7 MEDIUM | Open redirect in wp_validate_redirect() in WordPress |
| CVE-2020-4050 | 3.5 LOW | set-screen-option filter misuse by plugins leading to privilege escalation in WordPress |
| CVE-2020-4049 | 2.4 LOW | Authenticated self-XSS via theme uploads in WordPress |
IV. Related Vulnerabilities
Same vendor: WordPress
- CVE-2023-54333
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WordPress <= 6.8.2 - (Author+) Cross Site Scripting (XSS) Vu - CVE-2025-58246
WordPress <= 6.8.2 - (Contributor+) Sensitive Data Exposure - CVE-2025-54352
WordPress 安全漏洞 - CVE-2024-31211
Remote Code Execution in `WP_HTML_Token`
Same weakness: CWE-80
- CVE-2021-47948
WordPress GetPaid Plugin 2.4.6 HTML Injection via Help Text - CVE-2026-42030
MapServer: Improper Neutralization of Script-Related HTML Ta - CVE-2026-44264
Weblate is vulnerable to XSS via crafted Markdown - CVE-2026-6002
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HCL DFXAnalytics is affected by an Insecure Security Header
V. Comments for CVE-2020-4046
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