CVE-2026-41875: Quick.Cart Admin Panel CSRF Vulnerability

CVE-2026-41875 Overview

CVE-2026-41875 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting Quick.Cart, an e-commerce shopping cart application developed by OpenSolution. The flaw resides in the administrative configuration panel and allows an attacker to hijack authenticated admin sessions through crafted web pages. When an authenticated administrator visits a malicious site, the browser silently issues a POST request that modifies the admin account's login and password. Quick.Cart includes a referer-based CSRF check, but attackers can bypass this control by manipulating the Referer header. All forms in the admin interface are potentially affected. The issue was fixed in a patch to Quick.Cart version 6.7 released on 09.11.2026.

Critical Impact
Successful exploitation results in complete administrative account takeover of the Quick.Cart deployment through a single admin click on an attacker-controlled URL.

Affected Products

OpenSolution Quick.Cart versions prior to the 6.7 patch dated 09.11.2026
Deployments of Quick.Cart 6.7 without the November 2026 patch applied
All admin configuration forms exposed by Quick.Cart

Discovery Timeline

2026-09-29 - CVE-2026-41875 published to NVD
2026-09-30 - Last updated in NVD database

Technical Details for CVE-2026-41875

Vulnerability Analysis

The vulnerability allows an unauthenticated remote attacker to force state-changing actions in the Quick.Cart admin panel by leveraging an authenticated administrator's browser session. Because the admin panel accepts POST requests that modify sensitive settings without a valid anti-CSRF token, any origin capable of submitting a form to the admin endpoint can trigger those actions. The most direct impact is a credential change: the attacker rewrites the admin login and password, locking out the legitimate administrator and granting full control of the store.

Root Cause

Quick.Cart relies on Referer header validation as its primary defense against cross-origin form submissions. This approach is inherently weak: the header can be suppressed, omitted, or crafted through browser features and third-party contexts. The application does not issue or validate a per-session, per-form CSRF token bound to the authenticated user. As a result, the referer check is trivially bypassed and every form in the admin panel becomes an exploitable sink.

Attack Vector

Exploitation requires an active admin session and one user interaction, such as visiting a link or opening an email that loads attacker-controlled content. The malicious page hosts an auto-submitting HTML form targeting the Quick.Cart admin configuration endpoint with attacker-chosen values for the login and password fields. The victim's browser attaches the admin session cookie automatically. Because the referer check can be evaded, the server processes the request and overwrites the admin credentials. See the CERT Polska advisory for CVE-2026-41875 for further detail.

Detection Methods for CVE-2026-41875

Indicators of Compromise

Unexpected changes to the admin account login or password recorded in Quick.Cart configuration files or database records.
POST requests to admin configuration endpoints originating from external or unexpected referers.
Admin session activity immediately following navigation to an untrusted external URL in browser history.

Detection Strategies

Review web server access logs for POST requests to admin.php and related admin endpoints where the Referer header is missing, spoofed, or points to an unrelated domain.
Correlate administrator authentication events with subsequent configuration changes to identify short intervals between login and credential modification.
Alert on any modification to admin credential fields outside of documented change windows.

Monitoring Recommendations

Enable verbose application logging for all admin panel form submissions, including request origin metadata.
Forward Quick.Cart web and application logs to a centralized log analytics platform for retention and correlation.
Establish a baseline of legitimate admin activity and alert on deviations such as off-hours credential resets.

How to Mitigate CVE-2026-41875

Immediate Actions Required

Apply the Quick.Cart 6.7 patch published on 09.11.2026 to every deployment.
Rotate all administrator credentials after patching to invalidate any values silently modified before remediation.
Audit admin accounts and configuration for unauthorized changes made prior to the patch.

Patch Information

OpenSolution addressed the issue in a patch to Quick.Cart version 6.7 released on 09.11.2026. Administrators should obtain the patched build from the vendor at OpenSolution Quick.Cart and validate the deployment version after upgrade. Deployments running 6.7 without the November 2026 patch remain vulnerable.

Workarounds

Restrict access to the Quick.Cart admin panel by IP allowlist at the web server or firewall layer.
Require administrators to use a dedicated browser or browser profile with no exposure to untrusted sites while authenticated to Quick.Cart.
Enforce SameSite=Strict on admin session cookies at the reverse proxy to reduce cross-origin request risk.

bash

# Example nginx configuration restricting admin panel access by source IP
location /admin.php {
    allow 203.0.113.0/24;
    deny all;
    proxy_pass http://quickcart_backend;
}