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Vulnerability details

CVE-2026-41902

freescout-help-desk freescout

FreeScout's user invitation hash never expires: permanent unauthenticated account takeover if invite link leaks

CVSS 3.1
9.1Critical

Official description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.217, the /user-setup/{hash} endpoint accepts a 60-character random invite_hash to set a new user's password. The endpoint performs no expiration check — the hash remains valid indefinitely until consumed. Combined with realistic hash-leakage scenarios (forwarded invite emails, HTTP referrer to external CDNs on the setup page, server-side log exposure, abandoned invite emails in shared inboxes), this enables unauthenticated permanent account takeover months or years after invite issuance. If the leaked invite was sent to an admin, the takeover yields admin access. This issue has been patched in version 1.8.217.

CVSS scores

ScoreVersionSourceVector
9.1Critical 3.1 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

VendorProductVersionsSource
freescout-help-desk freescout < 1.8.217 CVEProject cvelistV5 (CNA)

References and advisories

2
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Details

Published
2026-05-07
Last updated
2026-05-09
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.24%
Probability of exploitation in 30 days
15.9%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
Proof of concept
Technical impact
Total

Weaknesses (CWE)

  • CWE-613
    Insufficient Session Expiration