freescout-help-desk FreeScout up to 1.8.229 Job Details Endpoint job_details cross site scripting

Summaryinfo

A vulnerability was found in freescout-help-desk FreeScout up to 1.8.229. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the file /system/ajax-html/job_details of the component Job Details Endpoint. The manipulation leads to cross site scripting. This vulnerability is uniquely identified as CVE-2026-85742. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in freescout-help-desk FreeScout up to 1.8.229. This issue affects an unknown function of the file /system/ajax-html/job_details of the component Job Details Endpoint. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.230, a pre-authenticated attacker can place HTML in a failed-login email value that is copied through monitored user activity into a queued SendAlert job. If alert delivery fails, the serialized payload is stored in failed_jobs and the administrator job-details endpoint renders it after a blacklist sanitizer that leaves executable event-handler attributes. When an administrator opens /system/ajax-html/job_details/{id} as a top-level page, the raw fragment lacks the normal layout policy and attacker-controlled JavaScript can perform same-origin administrator actions. Logs Monitoring for users, a failed alert email job, queue failure storage, and top-level administrator interaction are all required; the normal modal path is not affected in the tested configuration. This issue is fixed in version 1.8.230.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-85742 since 09/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.8.230 eliminates this vulnerability.

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Productinfo

Vendor

• freescout-help-desk

Name

• FreeScout

Version

• 1.8.229

Website

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

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