CVE-2026-40590
Prior to version 1.8.214, the Change Customer modal exposes a “Create a new customer” flow via POST /customers/ajax with action=create.
Does this matter?
Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own.
Description
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the Change Customer modal exposes a “Create a new customer” flow via POST /customers/ajax with action=create. Under limited visibility, the endpoint drops unique-email validation. If the supplied email already belongs to a hidden customer, Customer::create() reuses that hidden customer object and fills empty profile fields from attacker-controlled input. Version 1.8.214 fixes the vulnerability.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 0.21% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-639
- Source
- security-advisories@github.com
References
- https://github.com/freescout-help-desk/freescout/commit/b3d7611e6e173ed8a5e525b791deb6b32cf1ce62
- https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.