CVE-2025-61949: Secuavail LogStare Collector XSS Vulnerability

CVE-2025-61949 Overview

CVE-2025-61949 is a stored cross-site scripting (XSS) vulnerability in the UserManagement component of LogStare Collector. An authenticated attacker can inject crafted user information that is persisted by the application. When an administrator or other user views the affected management page, the stored payload executes in their browser session.

The flaw is tracked under CWE-79: Improper Neutralization of Input During Web Page Generation. It affects the Secuavail LogStare Collector product on both Linux and Windows deployments.

Critical Impact
Attackers with authenticated access can execute arbitrary JavaScript in the browser of any user who visits the LogStare Collector management page, enabling session theft, UI manipulation, or actions performed on behalf of the victim.

Affected Products

Secuavail LogStare Collector (all versions prior to the vendor fix)
LogStare Collector deployments on Linux
LogStare Collector deployments on Microsoft Windows

Discovery Timeline

2025-11-21 - CVE-2025-61949 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-61949

Vulnerability Analysis

The vulnerability resides in the UserManagement feature of LogStare Collector. The application accepts user profile input without adequately neutralizing HTML or JavaScript metacharacters before persisting the values. When those stored values are later rendered on the management page, the browser interprets attacker-supplied markup as executable script.

Exploitation requires an authenticated account with permission to create or modify user records. User interaction from a second user, typically an administrator loading the affected page, is required to trigger the payload. The confidentiality and integrity impact is limited to the browser context of the viewing user, but that context typically holds high-value session material for the management console.

Because the payload is stored server-side, it persists across sessions and affects every user who loads the affected view until the malicious record is removed. Refer to the JVN advisory JVN#77560819 for coordinated disclosure details.

Root Cause

The root cause is missing or insufficient output encoding when the UserManagement view renders user-controlled fields. Input validation on write and contextual encoding on read are both required to remediate stored XSS, and at least one control path was absent in the vulnerable versions.

Attack Vector

The attack is network-based against the LogStare Collector web management interface. An authenticated low-privilege user submits a crafted string containing HTML or script content into a UserManagement field. The payload is stored in the application backend. When another logged-in user, typically with higher privileges, opens the page that renders the affected field, the injected script executes with the victim's session context.

No verified public proof-of-concept is available. See the vendor advisory for product-specific technical detail.

Detection Methods for CVE-2025-61949

Indicators of Compromise

User records in LogStare Collector containing HTML tags such as <script>, <img onerror=...>, or <svg> payloads in name, description, or metadata fields.
Outbound HTTP requests from administrator browsers to unfamiliar domains shortly after loading the UserManagement page.
Unexpected session token reuse or administrative actions originating from atypical IP addresses.

Detection Strategies

Review application logs for HTTP POST or PUT requests to UserManagement endpoints containing encoded or raw script tags in body parameters.
Enable and review a Content Security Policy (CSP) report-only endpoint to capture inline script violations on the management interface.
Audit stored user records for HTML control characters and reject or flag entries that contain them.

Monitoring Recommendations

Alert on modifications to user accounts performed by low-privilege operators.
Monitor administrator workstations for anomalous browser process activity when accessing the LogStare Collector console.
Correlate management-console access logs with endpoint telemetry to identify session-hijacking attempts following user record edits.

How to Mitigate CVE-2025-61949

Immediate Actions Required

Apply the fixed version referenced in the Logstare Vulnerability Advisory 2025-001.
Audit existing user records for injected HTML or JavaScript and sanitize any suspicious entries.
Restrict UserManagement permissions to the smallest set of trusted operators until the patch is applied.

Patch Information

Secuavail has published remediation guidance in the Logstare Vulnerability Advisory 2025-001. Administrators should upgrade LogStare Collector to the fixed release identified in that advisory. Coordinated disclosure is tracked at JVN#77560819.

Workarounds

Limit access to the LogStare Collector management interface to trusted network segments using firewall or reverse-proxy allowlists.
Enforce a strict Content Security Policy on the management console to block inline script execution.
Require administrators to use a dedicated, hardened browser profile when accessing the management console.
Manually inspect and remove any suspicious user records before opening UserManagement pages with a privileged account.

bash

# Example nginx reverse-proxy allowlist for the management interface
location /usermanagement/ {
    allow 10.10.20.0/24;    # trusted admin subnet
    deny  all;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'";
    proxy_pass http://logstare-collector-backend;
}