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Faveo Helpdesk EUVDEUVD-2026-65158

| CVE-2026-78434 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-08-24 VulDB GHSA-j3fx-x2vv-hrr9
PHP Authentication Bypass Helpdesk
5.5
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
5.5 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
vuln.today AI
6.5 MEDIUM

Network-reachable endpoint with no auth required (PR:N) and no complexity; impact is limited to low-severity integrity and availability writes to ticket data with no confidentiality breach.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
CVSS changed
Aug 24, 2026 - 22:22 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
Analysis Generated
Aug 24, 2026 - 22:21 vuln.today
CVE Published
Aug 24, 2026 - 21:30 cve.org
MEDIUM 6.9

DescriptionCVE.org

A flaw has been found in Faveo Helpdesk up to 2.0.3. This impacts the function FormController::post_ticket_reply of the file app/Http/Controllers/Client/helpdesk/FormController.php of the component post-ticket-reply Endpoint. This manipulation causes missing authentication. The attack can be initiated remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

AnalysisAI

Unauthenticated actors can post ticket replies in Faveo Helpdesk versions 2.0.0 through 2.0.3 by sending crafted requests to the post-ticket-reply endpoint without valid session credentials. The flaw exists in FormController::post_ticket_reply (CWE-306), allowing manipulation of helpdesk communications and injection of fraudulent responses into active support tickets. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify Internet-exposed Faveo Helpdesk instance
Delivery
Enumerate valid ticket IDs via public interface
Exploit
Craft unauthenticated POST to post-ticket-reply endpoint
Execution
Inject attacker-controlled reply content into ticket thread
Impact
Manipulate support communication or conduct social engineering
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Vulnerability AssessmentAI

Exploitation No special authentication or account is required - the post-ticket-reply endpoint processes submissions without verifying the caller's identity, making this exploitable by any remote, unauthenticated party with network access to the Faveo Helpdesk instance. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.9 with vector AV:N/AC:L/AT:N/PR:N/UI:N reflects genuinely easy remote exploitation - no authentication, no complexity, no user interaction required - but a constrained blast radius (VI:L, VA:L only, VC:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated external attacker sends a crafted HTTP POST request directly to the post-ticket-reply endpoint, omitting any session token or authentication credential. Because FormController::post_ticket_reply lacks an authentication check, the server processes the submission and appends attacker-controlled content to an existing support ticket thread. …
Remediation No vendor-released patch has been identified at time of analysis; the Faveo Helpdesk maintainers have not responded to the responsible disclosure filed via GitHub issue 8346. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-65158 vulnerability details – vuln.today
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