Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-107848— Contao: Cross-site request forgery in custom backend actions

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 是一款开源的内容管理系统（CMS）。在 4.0.0 至 5.3.50 以及 5.7.0 至 5.7.12 版本中， 仅对 POST 请求验证 ，而基于声明式保护的 GET 请求检查仅在存在 参数时才会生效。因此，当已认证的后台用户访问攻击者控制的 URL 时，通过 参数分派的后台操作可以在不提供 CSRF 令牌的情况下执行。受影响的操作范围仅限于该用户可用的模块，本安全公告重点演示的是破坏性或状态变更的操作，而非权限提升。该问题已在版本 5.3.50 和 5.7.12 中得到修复。

CVSS 3.5 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-107848

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Contao: Cross-site request forgery in custom backend actions
Source: CVE Program / CVE List V5
Vulnerability Description
Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, RequestTokenListener validates REQUEST_TOKEN only for POST requests, while the declarative GET guard runs only when an act parameter is present. Backend actions dispatched through the key parameter can therefore execute without a CSRF token when an authenticated backend user loads an attacker-controlled URL. Reachable actions remain limited to modules available to that user, and the advisory demonstrates destructive or state-changing actions rather than privilege escalation. This issue is fixed in versions 5.3.50 and 5.7.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
contao contao >= 4.0.0, < 5.3.50 -

II. Public POCs for CVE-2026-107848

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-107848

请登录查看更多情报信息。

Vendor Pages for CVE-2026-107848 (1)

Other References for CVE-2026-107848 (2)

Same Patch Batch · contao · 2026-10-09 · 7 CVEs total

CVE-2026-107845 9.3 CRITICAL Contao: Cross-site scripting in the comments bundle
CVE-2026-107842 5.3 MEDIUM Contao: Protected page content is disclosed to anonymous visitors after contao.search.inde
CVE-2026-107844 5.3 MEDIUM Contao: Path traversal in the images controller
CVE-2026-107843 5.3 MEDIUM Contao: The registration module re-sends activation mails on any unauthenticated POST, wit
CVE-2026-107851 4.3 MEDIUM Contao: Improper access control in the table access voter
CVE-2026-107850 4.3 MEDIUM Contao: Improper access control in the preview links module

IV. Related Vulnerabilities

Same product: contao
Same vendor: contao
Same weakness: CWE-352

V. Comments for CVE-2026-107848

No comments yet

Leave a comment