CVE-2026-5920— Bold Page Builder <= 5.9.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'shortcode_content' Parameter
Quick assessment
Affected
boldthemes Bold Page Builder
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 Bold Page Builder 存在存储型跨站脚本（Stored XSS）漏洞。该漏洞存在于所有 5.9.6 及更早的版本中，具体原因是 短代码的 参数处理不当。 漏洞成因在于： 1. 安全过滤函数 存在可绕过性，攻击者可通过空字节（Null Byte）注入技术绕过该过滤机制； 2. 短代码处理器在对 Base64 解码后的内容进行输出时，缺乏足够的净化（Sanitization）处理。 上述缺陷使得拥有 Contributor（贡献者）或更高权限的已认证攻击者能够向页面中注入任意 W
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I. Basic Information for CVE-2026-5920
Vulnerability Information
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Vulnerability Title
Bold Page Builder <= 5.9.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'shortcode_content' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'shortcode_content' parameter of the bt_bb_shortcode shortcode in all versions up to, and including, 5.9.6. This is due to a bypassable security filter (bt_bb_save_pre) that can be circumvented via null byte injection, combined with insufficient output sanitization of base64-decoded content in the bt_bb_raw_content shortcode handler. 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.
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 |
|---|---|---|---|---|
| boldthemes | Bold Page Builder | 0 ~ 5.9.6 | - |
|
II. Public POCs for CVE-2026-5920
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-5920 (2)
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V. Comments for CVE-2026-5920
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