CVE-2025-27897 Overview
CVE-2025-27897 is a cross-site scripting (XSS) vulnerability in IBM Db2 Recovery Expert for Linux, UNIX and Windows version 5.5 IF 2. The flaw allows an unauthenticated attacker to embed arbitrary JavaScript code in the Web UI. Successful exploitation alters the intended functionality of the application and can lead to credential disclosure within a trusted session. The vulnerability is categorized under CWE-79, Improper Neutralization of Input During Web Page Generation.
Critical Impact
An unauthenticated remote attacker can inject malicious JavaScript into the Db2 Recovery Expert Web UI, enabling session-scoped credential theft and manipulation of trusted application functionality.
Affected Products
- IBM Db2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2
- Web UI component of IBM Db2 Recovery Expert
- Deployments exposing the Recovery Expert Web interface to users or networks
Discovery Timeline
- 2026-10-12 - CVE-2025-27897 published to the National Vulnerability Database
- 2026-10-13 - Last updated in NVD database
Technical Details for CVE-2025-27897
Vulnerability Analysis
The vulnerability resides in the Web UI of IBM Db2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2. User-controllable input is reflected or rendered by the Web UI without sufficient output encoding or input sanitization. This allows an attacker to supply JavaScript payloads that execute in the browser of any user who processes the crafted content. Because the issue impacts a database recovery management console, the browser context typically contains session tokens and administrative controls tied to Db2 recovery operations. Exploitation can enable credential disclosure, session riding, and manipulation of Web UI behavior within the trusted origin.
Root Cause
The root cause is improper neutralization of input during web page generation (CWE-79). The application fails to encode untrusted data before embedding it in HTML responses rendered by the Web UI. Without context-aware escaping or a strict Content Security Policy, attacker-supplied content is parsed as executable script by the user's browser.
Attack Vector
The attack is network-based and requires user interaction. An unauthenticated attacker crafts a malicious URL or submits data containing a JavaScript payload. When a legitimate user, often an administrator, loads the affected Web UI view, the payload executes under the application origin. The scope-changed impact permits the attacker to read session data, exfiltrate credentials entered into the interface, or perform actions on behalf of the victim. Refer to the IBM Support Page for vendor-provided technical details.
Detection Methods for CVE-2025-27897
Indicators of Compromise
- Web server access logs containing requests with <script>, javascript:, onerror=, or encoded script fragments targeting Recovery Expert Web UI endpoints.
- Unexpected outbound HTTP requests from administrator browsers to attacker-controlled domains following interaction with the Web UI.
- Session tokens or administrator credentials appearing in third-party request parameters originating from the Db2 Recovery Expert origin.
Detection Strategies
- Deploy a web application firewall rule set that inspects query strings, form fields, and headers reaching the Recovery Expert Web UI for reflected XSS patterns.
- Enable browser-side Content Security Policy reporting to surface inline script execution attempts in administrator sessions.
- Correlate Web UI HTTP request logs with endpoint telemetry to identify anomalous script execution within browser processes connecting to the Db2 Recovery Expert host.
Monitoring Recommendations
- Monitor administrative sessions for unusual DOM activity, token exfiltration, or outbound beaconing from browsers after visiting Recovery Expert URLs.
- Alert on repeated requests to Web UI endpoints containing URL-encoded script syntax or event handler attributes.
- Audit administrator account activity for session use from unexpected IP addresses or user agents following suspected XSS interaction.
How to Mitigate CVE-2025-27897
Immediate Actions Required
- Apply the fix referenced in the IBM Support Page for IBM Db2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2.
- Restrict network access to the Recovery Expert Web UI to trusted administrative networks and VPN segments.
- Instruct administrators to avoid clicking untrusted links that reference Recovery Expert Web UI endpoints until patching completes.
Patch Information
IBM has published remediation guidance on the vendor advisory. Review the IBM Support Page for CVE-2025-27897 and apply the vendor-recommended interim fix or upgrade for Db2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2. Validate the fix in a staging environment before production rollout, and confirm Web UI functionality after remediation.
Workarounds
- Place the Recovery Expert Web UI behind a reverse proxy that enforces strict Content Security Policy and strips reflected script syntax from request parameters.
- Limit Web UI access to a dedicated management network and require multi-factor authentication for all administrative sessions.
- Where feasible, disable or isolate the Web UI and perform recovery operations through command-line interfaces until a patch is applied.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
