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CVE-2026-102772— CMB2 <= 2.13.1 - Unauthenticated Stored Cross-Site Scripting via 'textarea_code' Field

Quick assessment

Affected
jtsternberg CMB2
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 CMB2 插件存在存储型跨站脚本漏洞，该漏洞位于所有不超过 2.13.1 版本中，具体出现在 '<textarea_code 字段 ID>'（例如 kl_code、kl_post_code）参数中，原因是输入清理不足和输出转义不够完善。这使得未经身份验证的攻击者能够在网页中注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本就会执行。前端保存路径仅需一个 CMB2 框的 nonce（一次性令牌），而该 nonce 通过简单的 GET 请求向所有访问者（包括未经身份验证的访客）公开，因此

CVSS 7.2 · High EPSS 0.31% · P21

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
jtsternberg CMB2 ≤ 2.13.1 affected
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I. Basic Information for CVE-2026-102772

Vulnerability Information
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Vulnerability Title
CMB2 <= 2.13.1 - Unauthenticated Stored Cross-Site Scripting via 'textarea_code' Field
Source: CVE Program / CVE List V5
Vulnerability Description
The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '<textarea_code field id> (e.g. kl_code, kl_post_code)' parameter in all versions up to, and including, 2.13.1 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. The front-end save path requires only a CMB2 box nonce, which is emitted to all visitors including unauthenticated guests via a simple GET request, making the attack trivially reachable without any credentials on sites that expose a public CMB2 form writing a textarea_code field.
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
jtsternberg CMB2 0 ~ 2.13.1 -

II. Public POCs for CVE-2026-102772

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III. Intelligence Information for CVE-2026-102772

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Patches & Fixes for CVE-2026-102772 (3)

Security Blog Posts for CVE-2026-102772 (1)

IV. Related Vulnerabilities

Same product: CMB2
Same vendor: jtsternberg
Same weakness: CWE-79

V. Comments for CVE-2026-102772

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