FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, attachment download tokens are generated using a weak and predictable formula: `md5(APP_KEY + attachment_id + size)`. Since attachment_id is sequential and size can be brute-forced in a small range, an unauthenticated attacker can forge valid tokens and download any private attachment without credentials. Version 1.8.213 fixes the issue.
CVSS v3.1 Score
9.1
/ 10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Information
- Published
- 21 avr. 2026
- Updated
- 23 avr. 2026
- Status
- Analyzed
- Source
- security-advisories@github.com
Affected products
freescout freescout
Versions : 1.8.213
Weaknesses (CWE)
CWE-330CWE-340
References (3)
Similar CVEs
Other vulnerabilities of type CWE-330
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