freescout-help-desk freescout up to 1.8.213 Conversation undo-reply authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in freescout-help-desk freescout up to 1.8.213. The impacted element is an unknown function of the file /conversation/undo-reply/ of the component Conversation Handler. The manipulation leads to authorization. This vulnerability is documented as CVE-2026-40592. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in freescout-help-desk freescout up to 1.8.213. It has been rated as problematic. This issue affects an unknown functionality of the file /conversation/undo-reply/ of the component Conversation Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity, and availability. The summary by CVE is:

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the undo-send route `GET /conversation/undo-reply/{thread_id}` checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a shared mailbox, one agent can therefore recall another agent's just-sent reply during the 15-second undo window. Version 1.8.214 fixes the vulnerability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-40592 since 04/14/2026. The exploitation is known to be difficult. The attack may be initiated remotely. Technical details are known, but no exploit is available.

Upgrading to version 1.8.214 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch c779afdda86fa00a4b85779e034bbfd9ce20c76d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• freescout-help-desk

Name

• freescout

Version

• 1.8.213

License

• open-source

Website

• Product: https://github.com/freescout-help-desk/freescout/

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