CVE-2025-40626
📋 TL;DR
A reflected XSS vulnerability in AbanteCart v1.4.0 allows attackers to inject malicious JavaScript via the /about_us parameter. When victims click a specially crafted URL, attackers can steal session cookies, credentials, or perform actions as the user. This affects all AbanteCart v1.4.0 installations with the vulnerable endpoint exposed.
💻 Affected Systems
- AbanteCart
📦 What is this software?
Abantecart by Abantecart
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals admin session cookies, gains full control of the e-commerce platform, accesses customer data, payment information, and modifies store content.
Likely Case
Attacker steals user session cookies to hijack accounts, perform unauthorized purchases, or deface the about_us page with malicious content.
If Mitigated
With proper input validation and output encoding, the attack fails to execute JavaScript, limiting impact to parameter reflection without code execution.
🎯 Exploit Status
Exploit requires crafting a URL with XSS payload in the about_us parameter and tricking users to click it.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/reflected-cross-site-scripting-xss-abantecart
Restart Required: No
Instructions:
1. Check AbanteCart vendor for official patch. 2. If unavailable, implement input validation and output encoding on the /about_us endpoint. 3. Apply web application firewall rules to block XSS payloads.
🔧 Temporary Workarounds
WAF Rule Implementation
allConfigure web application firewall to block requests containing XSS patterns in the about_us parameter.
# Example ModSecurity rule: SecRule ARGS:about_us "@detectXSS" "id:1001,phase:2,deny,status:403"
Input Validation Filter
allAdd server-side filtering to sanitize the about_us parameter before processing.
# PHP example: $about_us = htmlspecialchars($_GET['about_us'], ENT_QUOTES, 'UTF-8');
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution sources.
- Disable or restrict access to the /about_us endpoint if not essential.
🔍 How to Verify
Check if Vulnerable:
Test by accessing /about_us?<script>alert('XSS')</script> and checking if script executes in browser.Check Version:
Check AbanteCart admin panel or view source code version files.Verify Fix Applied:
Retest with same payload; script should not execute and input should be properly encoded in output.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /about_us containing script tags or JavaScript patterns in parameters.
- Unusual spikes in requests to /about_us endpoint.
Network Indicators:
- URLs with encoded script payloads in about_us parameter in HTTP traffic.
SIEM Query:
source="web_logs" AND uri_path="/about_us" AND (query="*script*" OR query="*javascript*")