cvedb.io
CVE-2026-53592
MEDIUM · CVSS 4.6
EPSS exploitation probability: 0%
Published 2026-07-20T20:16:44.747 · Last modified 2026-07-20T20:16:44.747

Summary

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.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.