CVE-2026-90571: Exrick xmall Order Print XSS Vulnerability

CVE-2026-90571 Overview

CVE-2026-90571 is a cross-site scripting (XSS) vulnerability in Exrick xmall, an open-source e-commerce management platform. The flaw exists in the Order Printing component, specifically within xmall-manager-web/src/main/webapp/WEB-INF/jsp/order-print.jsp. An attacker can inject malicious script content that executes in the context of an authenticated administrator's browser session. The vulnerability is remotely exploitable but requires user interaction to trigger. Exrick xmall follows a rolling release model, so specific affected version numbers are not published. The project maintainers were notified through a GitHub issue report but have not responded at the time of publication.

Critical Impact
Attackers can execute arbitrary JavaScript in the browser session of an administrator viewing crafted order data, enabling session hijacking, admin action forgery, and content manipulation of the xmall management interface.

Affected Products

Exrick xmall (commit range up to 19e7917d5ed3bd2a2421a3a246ad494c133ba94c)
Component: Order Printing (order-print.jsp)
Deployment: rolling release, no fixed version identifier

Discovery Timeline

2026-09-13 - CVE-2026-90571 published to NVD
2026-09-14 - Last updated in NVD database

Technical Details for CVE-2026-90571

Vulnerability Analysis

The vulnerability is a stored or reflected cross-site scripting flaw classified under [CWE-79]. The affected code path resides in the JSP template order-print.jsp, which renders order data for print output in the xmall management web application. Order fields containing user-controlled input are written into the HTML response without proper output encoding.

Because the Order Printing view is accessed by administrative users, exploitation enables an attacker to run script code with the privileges of an authenticated back-office user. Common outcomes include admin session token theft, unauthorized administrative actions performed on behalf of the victim, and defacement of rendered order data.

Root Cause

The root cause is missing or insufficient output encoding when order fields are inserted into the JSP template. JSP expressions that emit dynamic content into HTML require context-aware escaping using JSTL <c:out> or fn:escapeXml(). When raw scriptlet output or unescaped Expression Language is used, attacker-controlled order data is treated as executable markup by the browser.

Attack Vector

The attack is network-based and requires user interaction, meaning an administrator must view the crafted order print page for the payload to execute. An attacker who can place an order or otherwise populate order fields with HTML or JavaScript content can persist the payload. When staff open the order print view, the browser parses and runs the injected script.

No authenticated exploitation code is required from the attacker's side beyond submitting the tainted order field. See the GitHub Issue Discussion and the VulDB CVE Entry CVE-2026-90571 for additional technical context. Verified proof-of-concept code is not published in the referenced material.

Detection Methods for CVE-2026-90571

Indicators of Compromise

Order records containing HTML tags such as <script>, <img onerror=>, or <svg onload=> in customer-controlled fields like name, address, product notes, or shipping instructions.
Outbound requests from administrator browsers to unexpected external domains shortly after opening the order print view.
Unusual administrator session activity, including new admin accounts, permission changes, or bulk order modifications following access to order-print.jsp.

Detection Strategies

Inspect HTTP responses served from order-print.jsp for unescaped angle brackets or event-handler attributes within order data fields.
Deploy a web application firewall rule that flags order submissions containing script tags or JavaScript event handlers.
Review application logs for order creation events with payloads that match common XSS patterns, then correlate with subsequent admin views of the same order ID.

Monitoring Recommendations

Enable browser Content Security Policy (CSP) reporting on the xmall admin interface to capture blocked inline script executions.
Log and alert on administrator sessions that generate anomalous DOM-initiated network requests or cookie access patterns.
Monitor the GitHub Project Repository for maintainer response and any commit that modifies order-print.jsp.

How to Mitigate CVE-2026-90571

Immediate Actions Required

Restrict access to the xmall management interface to trusted administrative networks using IP allow-listing or VPN gating.
Audit existing order records for embedded HTML or JavaScript payloads and quarantine any that contain script content before administrators open them.
Instruct administrative staff to avoid opening the Order Printing view until output encoding is applied.

Patch Information

No official patch is available at the time of publication. The maintainers of Exrick xmall have been notified through the GitHub Issue Discussion but have not responded. Organizations running xmall should track the GitHub Project Repository for a fix and apply the JSP output-encoding change themselves as an interim measure.

Workarounds

Modify order-print.jsp to wrap all dynamic order field output in JSTL <c:out value="${field}"/> or apply fn:escapeXml() to enforce HTML entity encoding.
Deploy a strict Content Security Policy on the admin application that disallows inline scripts and restricts script sources to trusted origins.
Add server-side input validation on order submission endpoints to reject or sanitize fields containing HTML control characters.

bash

# Example CSP header to mitigate inline script execution in the xmall admin UI
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'";