CVE-2026-25993
📋 TL;DR
CVE-2026-25993 is a second-order SQL injection vulnerability in EverShop eCommerce platform that allows attackers to execute arbitrary SQL commands. Attackers can inject malicious SQL code into the url_key field, which gets executed later during category update/deletion events. All EverShop instances using vulnerable versions are affected.
💻 Affected Systems
- EverShop
📦 What is this software?
Evershop by Evershop
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data theft, modification, deletion, or remote code execution via database functions.
Likely Case
Data exfiltration of customer information, order data, and administrative credentials stored in the database.
If Mitigated
Limited impact if database user has minimal privileges and input validation blocks malicious strings.
🎯 Exploit Status
Requires ability to modify url_key field (typically admin access) and trigger category update/deletion events.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.1.1
Vendor Advisory: https://github.com/evershopcommerce/evershop/security/advisories/GHSA-3h84-9rhc-j2ch
Restart Required: Yes
Instructions:
1. Backup database and application files. 2. Update EverShop to version 2.1.1 or later via package manager or manual update. 3. Restart the application server. 4. Verify the patch is applied.
🔧 Temporary Workarounds
Input Validation for url_key
allAdd server-side validation to reject SQL special characters in url_key field
Implement regex validation: /^[a-zA-Z0-9-_]+$/ for url_key
Database User Privilege Reduction
allLimit database user permissions to SELECT, INSERT, UPDATE only
REVOKE DROP, CREATE, ALTER, EXECUTE FROM evershop_user;
🧯 If You Can't Patch
- Disable category update/deletion functionality in admin interface
- Implement WAF rules to block SQL injection patterns in POST requests to category endpoints
🔍 How to Verify
Check if Vulnerable:
Check package.json for EverShop version <2.1.1 or examine commit history for pre-patch codeCheck Version:
cat package.json | grep versionVerify Fix Applied:
Verify version is >=2.1.1 and check that SQL queries use parameterized statements in category event handlers📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple category update attempts with special characters
- Database queries with concatenated user input
Network Indicators:
- POST requests to /admin/category/* endpoints with SQL keywords
- Unusual database connection patterns from application server
SIEM Query:
source="app.log" AND ("SQL syntax" OR "You have an error in your SQL syntax") AND "/category/"