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CVE-2024-28234— Contao has insufficient BBCode sanitizer

Quick assessment

Affected
contao contao
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.

Contao是一套采用PHP开发的开源内容管理系统（CMS）。该系统支持搜索引擎、权限管理和CSS框架等。 Contao 4.13.40版本之前的4.x版本和5.3.4版本之前的5.x版本存在安全漏洞，该漏洞源于可以通过注释中的BBCode注入CSS样式。

CVSS 4.3 · Medium EPSS 0.57% · P47
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I. Basic Information for CVE-2024-28234

Vulnerability Information
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Vulnerability Title
Contao has insufficient BBCode sanitizer
Source: CVE Program / CVE List V5
Vulnerability Description
Contao is an open source content management system. Starting in version 2.0.0 and prior to versions 4.13.40 and 5.3.4, it is possible to inject CSS styles via BBCode in comments. Installations are only affected if BBCode is enabled. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, disable BBCode for comments.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Contao 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Contao是一套采用PHP开发的开源内容管理系统（CMS）。该系统支持搜索引擎、权限管理和CSS框架等。 Contao 4.13.40版本之前的4.x版本和5.3.4版本之前的5.x版本存在安全漏洞，该漏洞源于可以通过注释中的BBCode注入CSS样式。
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
contao contao >= 2.0.0, < 4.13.40 -

II. Public POCs for CVE-2024-28234

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III. Intelligence Information for CVE-2024-28234

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Patches & Fixes for CVE-2024-28234 (2)

Vendor Advisories for CVE-2024-28234 (1)

Other References for CVE-2024-28234 (1)

Same Patch Batch · contao · 2024-04-09 · 5 CVEs total

CVE-2024-28235 8.4 HIGH Contao possible cookie sharing with external domains while checking protected pages for br
CVE-2024-30262 5.9 MEDIUM Contao's remember-me tokens will not be cleared after a password change
CVE-2024-28190 5.4 MEDIUM Contao core bundle vulnerable to cross site scripting in the file manager
CVE-2024-28191 3.1 LOW Contao may have unencoded insert tags in the frontend

IV. Related Vulnerabilities

Same product: contao
Same vendor: contao
Same weakness: CWE-74