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CVE-2024-28235— Contao possible cookie sharing with external domains while checking protected pages for broken links

Quick assessment

Affected
contao contao
Exploitation
Public or AI PoC available; prioritize validation
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，该漏洞源于在检查受保护页面上的损坏链接时，会将cookie标头发送到外部url。

CVSS 8.4 · High EPSS 0.71% · P52

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2024-28235

Vulnerability Information
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Vulnerability Title
Contao possible cookie sharing with external domains while checking protected pages for broken links
Source: CVE Program / CVE List V5
Vulnerability Description
Contao is an open source content management system. Starting in version 4.9.0 and prior to versions 4.13.40 and 5.3.4, when checking for broken links on protected pages, Contao sends the cookie header to external urls as well, the passed options for the http client are used for all requests. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, disable crawling protected pages.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
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，该漏洞源于在检查受保护页面上的损坏链接时，会将cookie标头发送到外部url。
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 >= 4.9.0, < 4.13.40 -

II. Public POCs for CVE-2024-28235

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7753 chars
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III. Intelligence Information for CVE-2024-28235

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Patches & Fixes for CVE-2024-28235 (2)

Vendor Advisories for CVE-2024-28235 (1)

Other References for CVE-2024-28235 (2)

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

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-2024-28234 4.3 MEDIUM Contao has insufficient BBCode sanitizer
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-200

V. Comments for CVE-2024-28235

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