一、 漏洞 CVE-2025-27794 基础信息
漏洞标题
Flarum Vulnerable to Session Hijacking via Authoritative Subdomain Cookie Overwrite
来源：美国国家漏洞数据库 NVD
漏洞描述信息
Flarum is open-source forum software. A session hijacking vulnerability exists in versions prior to 1.8.10 when an attacker-controlled authoritative subdomain under a parent domain (e.g., `subdomain.host.com`) sets cookies scoped to the parent domain (`.host.com`). This allows session token replacement for applications hosted on sibling subdomains (e.g., `community.host.com`) if session tokens aren't rotated post-authentication. Key Constraints are that the attacker must control any subdomain under the parent domain (e.g., `evil.host.com` or `x.y.host.com`), and the parent domain must not be on the Public Suffix List. Due to non-existent session token rotation after authenticating we can theoretically reproduce the vulnerability by using browser dev tools, but due to the browser's security measures this does not seem to be exploitable as described. Version 1.8.10 contains a patch for the issue.
来源：美国国家漏洞数据库 NVD
CVSS信息
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
来源：美国国家漏洞数据库 NVD
漏洞类别
输出中的特殊元素转义处理不恰当(注入)
来源：美国国家漏洞数据库 NVD
二、漏洞 CVE-2025-27794 的公开POC
# POC 描述 源链接 神龙链接
三、漏洞 CVE-2025-27794 的情报信息