CVE-2025-62326: HCL Digital Experience XSS Vulnerability

CVE-2025-62326 Overview

HCL Digital Experience is susceptible to a stored cross-site scripting (XSS) vulnerability in the administrative user interface. This security flaw allows attackers with elevated privileges to inject malicious scripts that persist within the application and execute in the context of other administrative users' browsers when they access the affected interface.

Critical Impact

Attackers with high privileges can inject persistent malicious scripts into the administrative interface, potentially compromising other administrator sessions, stealing credentials, or performing unauthorized actions on behalf of privileged users.

Affected Products

• HCL Digital Experience version 9.5
• hcltech digital_experience

Discovery Timeline

• 2026-02-20 - CVE CVE-2025-62326 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2025-62326

Vulnerability Analysis

This stored XSS vulnerability (CWE-79) exists within the administrative user interface of HCL Digital Experience. Unlike reflected XSS attacks that require victims to click malicious links, stored XSS payloads are permanently saved on the target server and automatically executed when other users access the compromised page.

The vulnerability requires the attacker to possess elevated (high) privileges to exploit, which serves as a limiting factor in its practical exploitability. However, once exploited, the malicious payload can affect any administrator who subsequently accesses the tainted interface, making it particularly dangerous in environments with multiple administrative users.

The cross-site change in scope means that while the vulnerability exists in the HCL Digital Experience application, the impact can extend to the user's browser context, potentially allowing access to cookies, session tokens, and other sensitive data stored for other domains within the same browser session.

Root Cause

The root cause of this vulnerability lies in improper neutralization of user-supplied input during web page generation. Specifically, the administrative interface fails to adequately sanitize or encode user input before storing it in the application's database and subsequently rendering it in HTML output. This allows specially crafted script content to be preserved and later executed as part of the legitimate page markup when administrators view the affected pages.

Attack Vector

The attack vector is network-based, requiring the attacker to have authenticated access to the HCL Digital Experience administrative interface with high privileges. The attack flow proceeds as follows:

1. An attacker with administrative privileges accesses a vulnerable input field within the administrative interface
2. The attacker injects a malicious JavaScript payload into the field
3. The application stores this payload without proper sanitization
4. When other administrators access the page containing the stored payload, the malicious script executes in their browser context
5. The script can then perform actions such as session hijacking, credential theft, or unauthorized administrative actions

The vulnerability requires user interaction, as a victim administrator must navigate to the compromised page for the payload to execute. However, this is a low barrier in administrative interfaces that are regularly accessed during normal operations.

Detection Methods for CVE-2025-62326

Indicators of Compromise

• Unexpected JavaScript or HTML tags stored in administrative interface data fields
• Unusual administrative session activity or unauthorized configuration changes
• Browser console errors indicating execution of malicious scripts
• Network traffic to unknown external domains initiated from administrator browsers while accessing the admin interface

Detection Strategies

• Implement Content Security Policy (CSP) headers to detect and block unauthorized script execution
• Deploy Web Application Firewall (WAF) rules to monitor for XSS payload patterns in request bodies
• Enable comprehensive logging of all administrative interface interactions and input submissions
• Perform regular security audits of stored data for potential XSS payloads

Monitoring Recommendations

• Monitor administrative user sessions for anomalous behavior patterns or unexpected actions
• Implement real-time alerting for modifications to critical administrative settings
• Review HTTP response headers to ensure proper content-type and security headers are enforced
• Track and investigate any attempts to access resources outside normal administrative workflows

How to Mitigate CVE-2025-62326

Immediate Actions Required

• Apply the security patch from HCL Software as referenced in KB0128824
• Audit existing administrative data for potentially malicious stored content
• Limit administrative access to trusted personnel only until patching is complete
• Enable Content Security Policy headers to provide defense-in-depth against XSS

Patch Information

HCL Software has released security guidance for this vulnerability. Administrators should consult the HCL Software Knowledge Base Article for detailed patching instructions and updated software versions that address CVE-2025-62326. Ensure that HCL Digital Experience version 9.5 is updated to the latest patched release.

Workarounds

• Implement strict Content Security Policy (CSP) headers that restrict script execution sources
• Limit administrative access to a minimal set of highly trusted users pending patch deployment
• Deploy a Web Application Firewall (WAF) with XSS detection rules in front of the application
• Consider network segmentation to isolate the administrative interface from general network access

# Example CSP header configuration for Apache
# Add to httpd.conf or .htaccess
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; object-src 'none'; frame-ancestors 'self';"