CVE-2025-11594
📋 TL;DR
This vulnerability in ywxbear PHP-Bookstore-Website-Example and PHP Basic BookStore Website allows remote attackers to manipulate quantity values in the shopping cart due to improper input validation. Attackers could potentially exploit this to purchase items at incorrect prices or cause other payment logic issues. All deployments of these specific PHP bookstore projects up to commit 0e0b9f542f7a2d90a8d7f8c83caca69294e234e4 are affected.
💻 Affected Systems
- ywxbear PHP-Bookstore-Website-Example
- PHP Basic BookStore Website
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete payment system bypass allowing free or heavily discounted purchases, financial loss for the business, and potential data integrity issues in order processing.
Likely Case
Partial payment manipulation where attackers can purchase items at incorrect prices, leading to financial discrepancies and inventory management problems.
If Mitigated
Minor operational disruption with no financial impact if proper input validation and server-side checks are implemented.
🎯 Exploit Status
Exploit details are publicly disclosed in the referenced GitHub report. Attack requires access to the quantity handler functionality, which typically requires adding items to cart first.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit after 0e0b9f542f7a2d90a8d7f8c83caca69294e234e4
Vendor Advisory: Not available - these are GitHub projects without formal vendor support
Restart Required: No
Instructions:
1. Update to the latest commit from the GitHub repository. 2. Review and apply the fix from the vulnerability report. 3. Implement proper server-side validation for all quantity inputs.
🔧 Temporary Workarounds
Input Validation Workaround
allAdd server-side validation to check quantity values before processing payments
// In PHP, add validation like: if(!is_numeric($quantity) || $quantity <= 0 || $quantity > MAX_ALLOWED) { die('Invalid quantity'); }
WAF Rule
allImplement web application firewall rules to block suspicious quantity parameter manipulation
ModSecurity rule: SecRule ARGS:quantity "@rx [^0-9]" "id:1001,phase:2,deny,status:403,msg:'Invalid quantity parameter'"
🧯 If You Can't Patch
- Implement server-side validation that checks quantity values are positive integers within reasonable bounds before processing any payment
- Add logging and monitoring for unusual quantity values or price calculations in the payment workflow
🔍 How to Verify
Check if Vulnerable:
Test by attempting to submit negative, zero, or extremely large quantity values through the cart/checkout process and observe if they're accepted without validation.Check Version:
Check git commit hash: git log --oneline -1Verify Fix Applied:
Attempt the same quantity manipulation tests and verify they are rejected with proper error messages and no payment processing occurs.📡 Detection & Monitoring
Log Indicators:
- Unusual quantity values in order logs
- Price calculations that don't match expected formulas
- Multiple failed validation attempts on quantity parameter
Network Indicators:
- HTTP requests with manipulated quantity parameters
- Unusual patterns in checkout process requests
SIEM Query:
web_access_logs | where url contains "index.php" and (quantity <= 0 or quantity > 100) | count by src_ip