CVE-2026-23756 | GFI HelpDesk up to 4.99.8 Troubleshooter Controller_Step.InsertSubmit subject cross site scripting

VDB-358342 · CVE-2026-23756 · GCVE-0-2026-23756 GFI HELPDESK UP TO 4.99.8 TROUBLESHOOTER CONTROLLER_STEP.INSERTSUBMIT SUBJECT CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.4 $0-$5k 2.41+ Summaryinfo A vulnerability described as problematic has been identified in GFI HelpDesk up to 4.99.8. The affected element is the function Controller_Step.InsertSubmit of the component Troubleshooter Module. Executing a manipulation of the argument subject can lead to cross site scripting. This vulnerability is tracked as CVE-2026-23756. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended. Detailsinfo A vulnerability was found in GFI HelpDesk up to 4.99.8. It has been declared as problematic. This vulnerability affects the function Controller_Step.InsertSubmit of the component Troubleshooter Module. The manipulation of the argument subject with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. CVE summarizes: GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the Troubleshooter module where the subject POST parameter is not sanitized in Controller_Step.InsertSubmit() and EditSubmit() before being rendered by View_Step.RenderViewSteps(). An authenticated staff member can inject arbitrary JavaScript into the step subject field, and the payload executes when any user navigates to Troubleshooter > View Troubleshooter and clicks the affected step link. The weakness was disclosed by Alex Williams. The advisory is available at gfi.ai. This vulnerability was named CVE-2026-23756 since 01/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project. Upgrading to version 4.99.9 eliminates this vulnerability. Productinfo Vendor GFI Name HelpDesk Version 4.99.0 4.99.1 4.99.2 4.99.3 4.99.4 4.99.5 4.99.6 4.99.7 4.99.8 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 4.4 VulDB Meta Temp Score: 4.4 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.4 CNA Vector (VulnCheck): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-79 / CWE-94 / CWE-74 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: HelpDesk 4.99.9 Timelineinfo 01/15/2026 CVE reserved 04/20/2026 +94 days Advisory disclosed 04/20/2026 +0 days VulDB entry created 04/20/2026 +0 days VulDB entry last update Sourcesinfo Advisory: gfi.ai Researcher: Alex Williams Status: Confirmed CVE: CVE-2026-23756 (🔒) GCVE (CVE): GCVE-0-2026-23756 GCVE (VulDB): GCVE-100-358342 Entryinfo Created: 04/20/2026 19:59 Changes: 04/20/2026 19:59 (79) Complete: 🔍 Cache ID: 99:94D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸