CVE-2025-40978: eCommerceGo SaaS Stored XSS Vulnerability

CVE-2025-40978 Overview

A stored Cross-Site Scripting (XSS) vulnerability has been identified in WorkDo's eCommerceGo SaaS platform. The vulnerability exists due to improper validation of user input when processing POST requests to the /ticket/x/conversion endpoint. Attackers can exploit the reply_description parameter to inject malicious scripts that are stored on the server and executed in the browsers of other users who view the affected content.

Critical Impact

Attackers can inject persistent malicious scripts that execute in victims' browsers, potentially leading to session hijacking, credential theft, unauthorized actions on behalf of users, and defacement of the application interface.

Affected Products

• WorkDo eCommerceGo SaaS

Discovery Timeline

• 2026-01-12 - CVE-2025-40978 published to NVD
• 2026-01-13 - Last updated in NVD database

Technical Details for CVE-2025-40978

Vulnerability Analysis

This stored XSS vulnerability occurs within the ticket conversion functionality of the eCommerceGo SaaS platform. When users submit ticket replies through the /ticket/x/conversion endpoint, the application fails to properly sanitize or encode the reply_description parameter before storing it in the database and subsequently rendering it in the user interface.

Unlike reflected XSS attacks that require victims to click malicious links, stored XSS payloads persist on the server. This means that every user who views the affected ticket conversation will have the malicious script executed in their browser context, significantly amplifying the potential impact of the attack.

The vulnerability requires low privileges to exploit, meaning an authenticated user with basic access to the ticketing system can inject malicious payloads. Some passive user interaction is needed for the attack to succeed, as victims must view the page containing the stored payload.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding (CWE-79) in the ticket reply handling functionality. The application does not properly sanitize user-supplied data in the reply_description parameter before storing it in the database, nor does it properly encode the content when rendering it back to users in the browser. This lack of defense-in-depth allows HTML and JavaScript code to be injected and executed.

Attack Vector

The attack is network-based and can be executed by any authenticated user with access to the ticket system. An attacker crafts a POST request to the /ticket/x/conversion endpoint containing malicious JavaScript code within the reply_description parameter. Once submitted, the payload is stored in the application database. When other users, including administrators, view the ticket conversation containing the malicious reply, the injected script executes in their browser session.

This can lead to various malicious outcomes including stealing session cookies, capturing keystrokes, redirecting users to phishing pages, performing actions on behalf of the victim, or modifying the displayed content to deceive users.

Detection Methods for CVE-2025-40978

Indicators of Compromise

• Unusual JavaScript code patterns in ticket reply content, including <script> tags, event handlers (e.g., onerror, onload), or encoded script payloads
• POST requests to /ticket/x/conversion containing HTML tags or JavaScript in the reply_description parameter
• Unexpected outbound connections from client browsers when viewing ticket conversations
• User reports of strange behavior or unexpected redirects when accessing ticket pages

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block XSS patterns in POST request payloads targeting the ticket endpoint
• Deploy content security policy (CSP) headers with violation reporting to identify attempted script injection
• Monitor application logs for suspicious input patterns containing common XSS attack signatures
• Conduct periodic database audits to identify stored content with suspicious HTML or JavaScript patterns

Monitoring Recommendations

• Enable detailed logging for all POST requests to ticket-related endpoints with full parameter capture
• Configure real-time alerting for WAF rule violations related to XSS attack patterns
• Implement client-side monitoring to detect unauthorized script execution or DOM manipulation
• Review CSP violation reports regularly to identify potential XSS exploitation attempts

How to Mitigate CVE-2025-40978

Immediate Actions Required

• Apply vendor security patches as soon as they become available from WorkDo
• Implement a web application firewall with XSS filtering rules to block malicious payloads
• Review existing ticket data in the database for any injected malicious content and sanitize as needed
• Restrict access to the ticketing system to trusted users until patches are applied

Patch Information

Security updates for this vulnerability are being tracked by INCIBE. Organizations should consult the INCIBE Security Notice for patch availability and specific remediation guidance from the vendor. Monitor WorkDo's official channels for security updates addressing this stored XSS vulnerability in the eCommerceGo SaaS platform.

Workarounds

• Implement strict Content Security Policy (CSP) headers to prevent inline script execution and limit script sources to trusted domains
• Deploy input validation at the application layer to strip or encode HTML entities in the reply_description parameter
• Use HTTP-only and Secure flags on session cookies to mitigate the impact of potential session hijacking via XSS
• Consider temporarily disabling the ticket conversion functionality until a patch is available if the risk is deemed unacceptable

Organizations should implement server-side input validation and output encoding as a defense-in-depth measure. Configure CSP headers with directives such as script-src 'self' to restrict script execution to trusted sources and enable violation reporting to detect exploitation attempts.