CVE-2025-14602: Information Disclosure Vulnerability

CVE-2025-14602 Overview

CVE-2025-14602 affects the vsDesk application, which generates uploaded file names using a weak and predictable method based on the request timestamp. A remote attacker with low privileges can guess or brute-force generated filenames within a short time window. Successful exploitation allows an attacker to locate and access uploaded files, exposing confidential data and enabling follow-on attacks. The vendor released a fix in vsDesk version 14.0101. The weakness is classified under CWE-340: Generation of Predictable Numbers or Identifiers.

Critical Impact
Attackers can predict uploaded file names and retrieve confidential documents from the vsDesk help desk platform without proper authorization.

Affected Products

vsDesk help desk platform versions prior to 14.0101
Deployments accepting file uploads through the vsDesk web interface
Any vsDesk instance exposed to authenticated users on the network

Discovery Timeline

2026-08-20 - CVE-2025-14602 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2025-14602

Vulnerability Analysis

The vsDesk application derives uploaded file names from the request timestamp. This deterministic naming scheme produces predictable identifiers within a narrow, guessable range. An attacker who knows the approximate upload time can enumerate candidate file names and locate uploaded content directly. Because the file store is reachable over the network with only low-privileged authentication, the barrier to exploitation is minimal.

The vulnerability maps to CWE-340, which covers predictable identifier generation. Confidentiality is impacted, while integrity and availability remain unaffected. The Exploit Prediction Scoring System places this issue in the lower probability range, but successful exploitation exposes files intended to remain private between requesters and support staff.

Root Cause

The root cause is the use of request timestamps as the sole entropy source when constructing uploaded file names. Timestamps offer millisecond-scale predictability, not the cryptographic randomness required for unguessable resource identifiers. The application should generate names using a cryptographically secure random source combined with server-side access controls.

Attack Vector

An authenticated remote attacker submits or observes an upload event and records the approximate time. The attacker then iterates through timestamp-derived filename candidates and issues direct requests to the upload directory. Once a valid filename is guessed, the file is returned without additional authorization checks, disclosing its contents. See the GitHub Advisory KLSA-00294 for technical details.

Detection Methods for CVE-2025-14602

Indicators of Compromise

Repeated HTTP GET requests to the vsDesk uploads directory with sequential or time-adjacent filename patterns
Unusual volumes of 200 and 404 responses from the file storage endpoint originating from a single authenticated session
Access to uploaded attachments by users other than the original requester or assigned support agent

Detection Strategies

Alert on burst enumeration behavior against the vsDesk file download path within short time windows
Correlate upload events with subsequent download requests and flag downloads performed by unrelated accounts
Baseline normal user download rates and trigger on statistical outliers indicating brute-force filename discovery

Monitoring Recommendations

Enable verbose access logging on the vsDesk web server, capturing full request URIs and authenticated user identifiers
Forward vsDesk application and web server logs to a centralized log platform for retention and correlation
Review file access audit trails weekly for anomalous cross-ticket download patterns

How to Mitigate CVE-2025-14602

Immediate Actions Required

Upgrade vsDesk to version 14.0101 or later, which contains the vendor-supplied patch
Rotate or invalidate any previously uploaded attachments considered sensitive, as prior filenames remain predictable
Restrict network access to the vsDesk instance to trusted user populations while patching is scheduled

Patch Information

The vendor has released a fix. Apply the patch available from vsDesk. Versions 14.0101 and later contain the corrected filename generation logic. Confirm the running version after upgrade and validate that new uploads produce non-predictable identifiers.

Workarounds

Place the vsDesk uploads directory behind an authenticated proxy that enforces per-file access control tied to ticket ownership
Disable direct file download links and require attachment retrieval through an authenticated application endpoint that validates the requesting user
Reduce attachment retention windows so predictable filenames expire before enumeration becomes practical

bash

# Configuration example: restrict direct access to vsDesk uploads via nginx
location /uploads/ {
    internal;
    auth_request /auth/validate;
    add_header Cache-Control "no-store";
}