CVE-2026-53592
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
39/100
Published: 2026-07-20
Modified: 2026-10-24
First seen: 2026-10-29
Status: active
Attack Surface
Network
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
Low
UI:
Required
S:
Unchanged
C:
Low
I:
Low
A:
Low
Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. A Prototype Pollution condition in the `getQueryParam` function `/public/js/main.js` and was addressed in version 1.8.139 by blocking URL query keys matching the pattern `__proto__`. However, this mitigation is incomplete: it only filters top-level `__proto__` keys and fails to sanitize nested forms such as `b[__proto__][polluted]=PWNED`. As a result, an attacker-controlled URL query string can still write into `Object.prototype` on any page that loads `main.js`. Version 1.8.223 contains a updated fix.