CVE-2026-23758 | GFI HelpDesk up to 4.99.8 POST Parameter Controller_Ticket.EditSubmit editsubject cross site scripting

VDB-358344 · CVE-2026-23758 · GCVE-0-2026-23758 GFI HELPDESK UP TO 4.99.8 POST PARAMETER CONTROLLER_TICKET.EDITSUBMIT EDITSUBJECT CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.4 $0-$5k 2.06+ Summaryinfo A vulnerability classified as problematic was found in GFI HelpDesk up to 4.99.8. This affects the function Controller_Ticket.EditSubmit of the component POST Parameter Handler. The manipulation of the argument editsubject results in cross site scripting. This vulnerability is cataloged as CVE-2026-23758. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised. Detailsinfo A vulnerability classified as problematic has been found in GFI HelpDesk up to 4.99.8. Affected is the function Controller_Ticket.EditSubmit of the component POST Parameter Handler. The manipulation of the argument editsubject with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes: GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the ticket subject field that allows authenticated staff members to inject malicious JavaScript by manipulating the editsubject POST parameter. Attackers can inject XSS payloads through inadequate sanitization in Controller_Ticket.EditSubmit() that bypass the incomplete SanitizeForXSS() method to execute arbitrary JavaScript when other staff members or administrators view the affected ticket. The weakness was shared by Alex Williams. The advisory is shared for download at gfi.ai. This vulnerability is traded as CVE-2026-23758 since 01/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007. 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: 3.5 VulDB Meta Temp Score: 3.4 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 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-2026-23758 (🔒) GCVE (CVE): GCVE-0-2026-23758 GCVE (VulDB): GCVE-100-358344 Entryinfo Created: 04/20/2026 20:02 Changes: 04/20/2026 20:02 (70) Complete: 🔍 Cache ID: 99:C2A:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸