CVE-2025-15399: IBM Common Licensing CSRF Vulnerability

CVE-2025-15399 Overview

CVE-2025-15399 is a Cross-Site Request Forgery (CSRF) vulnerability affecting IBM Common Licensing Agent and ART components. The flaw impacts Agent versions 9.0, 9.0.0.1, and 9.0.0.2, along with ART versions 9.0, 9.0.0.1, and 9.0.0.2. An attacker can trick authenticated users into submitting unauthorized requests that the licensing service accepts as legitimate. The vulnerability maps to CWE-352: Cross-Site Request Forgery and carries a network-based attack vector requiring no authentication or privileges.

Critical Impact
Successful exploitation allows attackers to execute unauthorized actions in the context of a trusted user session, potentially leading to full compromise of confidentiality, integrity, and availability across the licensing infrastructure.

Affected Products

IBM Common Licensing Agent 9.0, 9.0.0.1, 9.0.0.2
IBM Common Licensing ART 9.0, 9.0.0.1, 9.0.0.2
Systems where administrators access the licensing interface via web browser

Discovery Timeline

2026-09-18 - CVE-2025-15399 published to the National Vulnerability Database
2026-09-21 - Last updated in NVD database

Technical Details for CVE-2025-15399

Vulnerability Analysis

The vulnerability resides in IBM Common Licensing Agent and ART components that fail to validate the origin of state-changing HTTP requests. The application relies on session cookies for authentication without requiring an unpredictable, per-request anti-CSRF token. An attacker crafts a malicious web page or email that triggers a background request to the licensing endpoint. When an authenticated administrator visits the attacker-controlled page, the browser automatically attaches valid session credentials to the forged request.

Because the licensing agent processes the request as if the user initiated it, the attacker gains the ability to perform any action the victim is authorized to execute. The scope change indicated by the vulnerability classification suggests exploitation can affect resources beyond the vulnerable component itself. This includes licensing configuration changes, user manipulation, or service disruption.

Root Cause

The root cause is the absence of CSRF protection mechanisms on state-changing endpoints. The application does not implement synchronizer tokens, double-submit cookies, or SameSite cookie restrictions to distinguish legitimate user actions from forged cross-origin requests.

Attack Vector

Exploitation requires an attacker to lure an authenticated user to a malicious page while the user maintains an active session with the licensing interface. The attack requires no user interaction with the malicious payload beyond visiting the page. The vulnerability mechanism involves standard HTML form submissions, image tags, or JavaScript-triggered requests that carry ambient session credentials. See the IBM Support Page for vendor-specific technical details.

Detection Methods for CVE-2025-15399

Indicators of Compromise

Unexpected licensing configuration changes without corresponding administrator activity logs
HTTP requests to licensing endpoints with Referer or Origin headers pointing to external domains
Session activity from IP addresses or user agents inconsistent with known administrator patterns
Unauthorized modifications to licensing records or entitlements during off-hours

Detection Strategies

Deploy web application firewall rules that inspect Origin and Referer headers on requests to IBM licensing endpoints
Enable verbose audit logging on the Common Licensing Agent to capture all state-changing operations with source metadata
Correlate administrator browser activity with licensing API calls to identify requests lacking direct user interaction

Monitoring Recommendations

Forward licensing agent logs to a centralized SIEM for behavioral baselining and anomaly identification
Alert on configuration changes originating from sessions with unusual cross-origin request patterns
Monitor for spikes in failed or successful administrative actions that lack corresponding UI navigation events

How to Mitigate CVE-2025-15399

Immediate Actions Required

Apply the patches referenced on the IBM Support Page as soon as they are validated in your environment
Restrict network access to the licensing agent interface to trusted administrative subnets only
Instruct administrators to log out of the licensing console immediately after use and avoid concurrent browsing

Patch Information

IBM has published remediation guidance on its support portal. Refer to the IBM Support Page for the specific fixed versions and upgrade procedures applicable to Common Licensing Agent and ART deployments.

Workarounds

Configure session cookies with SameSite=Strict at the reverse proxy layer where technically feasible
Use a dedicated browser or browser profile exclusively for licensing administration to eliminate cross-site attack surface
Enforce short session timeouts on the licensing interface to reduce the exploitation window

bash

# Example reverse-proxy hardening for licensing endpoint access
# Restrict access to trusted admin subnet and enforce SameSite cookies
location /licensing/ {
    allow 10.0.10.0/24;
    deny all;
    proxy_cookie_path / "/; SameSite=Strict; Secure; HttpOnly";
    proxy_pass http://licensing-backend;
}