🔴 严重 | CVE-2026-53595 — FreeScout is a free help desk and shared inbox bui...
🔴 《严重安全漏洞：CVE-2026-53595》
CVSS 评分: 严重（9.4） 状态: Received 发布时间: 2026-07-20
漏洞描述
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.224, the public endpoint POST /user-setup/{hash}/{invite_sent_at} (OpenController@userSetupSave) selects the target account solely by its invite_hash column, then overwrites that account's email and password and logs in as it. No authentication, cookie, or prior session is required. After a user activates, FreeScout sets invite_hash to the empty string. On MySQL and MariaDB, VARCHAR equality ignores trailing spaces, so a single URL-encoded space (%20) matches the stored empty string and selects the lowest-id activated user. The expiry guard decrypts invite_sent_at with the target's password hash, but Helper::decrypt returns its raw input unchanged when decryption fails. A plaintext numeric value such as 9999999999 therefore passes the time-to-live check without any secret. The result is that an anonymous attacker sets the email and password of the lowest-id activated FreeScout account (a support agent, or an administrator if one was added by invitation) and authenticates as that account. Version 1.8.224 contains a fix.
🔍 技术细节
| 字段 | 值 |
|---|---|
| CVE ID | CVE-2026-53595 |
| CVSS 评分 | 9.4 🔴 |
| 严重程度 | 严重 |
| CVSS 向量 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
| CWE 分类 | CWE-178,CWE-287,CWE-640 |
| 发布时间 | 2026-07-20 |
| 最后更新 | 2026-07-20 |
| 状态 | Received |
| 数据来源 | security-advisories@github.com |