/Vulnerability Library

FreeScout < 1.8.224 - Invite Hash Authorization Bypass

CVE-2026-53595
Verified

Description

FreeScout prior to 1.8.224 contains an authentication bypass caused by improper invite_hash handling and decryption failure in user setup endpoint, letting anonymous attackers reset credentials and log in as the lowest-id activated user, exploit requires no authentication.

Severity

Critical

CVSS Score

9.4

Exploit Probability

2%

Affected Product

freescout

Published Date

September 2, 2026

Template Author

str4k3r

CVE-2026-53595.yaml
9.4Score

CVSS Metrics

CVSS Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVE ID:
cve-2026-53595
CWE ID:
cwe-289

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-jqj5-r72v-v29ghttps://github.com/freescout-help-desk/freescout/commit/c4688c31https://nvd.nist.gov/vuln/detail/CVE-2026-53595

Remediation Steps

Upgrade to version 1.8.224 or later.