CVE-2025-28103
📋 TL;DR
This vulnerability in flaskBlog v2.6.1 allows attackers to delete arbitrary user accounts without proper authorization. Attackers can exploit incorrect access control by sending specially crafted requests. All users running the vulnerable version are affected.
💻 Affected Systems
- flaskBlog
📦 What is this software?
Flaskblog by Dogukanurker
⚠️ Risk & Real-World Impact
Worst Case
Complete user account deletion leading to data loss, service disruption, and potential privilege escalation if admin accounts are deleted.
Likely Case
Targeted deletion of user accounts causing data loss, user complaints, and potential compliance violations.
If Mitigated
Minimal impact with proper access controls, logging, and monitoring in place to detect and block unauthorized deletion attempts.
🎯 Exploit Status
Exploitation requires crafting specific HTTP requests but is straightforward once understood. References show proof-of-concept details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/DogukanUrker/flaskBlog/issues/130
Restart Required: Yes
Instructions:
1. Monitor GitHub repository for patch release. 2. Apply patch when available. 3. Restart flaskBlog service. 4. Verify fix prevents unauthorized account deletion.
🔧 Temporary Workarounds
Implement Access Control Middleware
allAdd authorization checks before account deletion operations
# Add proper role/permission checks in account deletion endpoints
Rate Limit Account Deletion Endpoints
allLimit how many account deletion requests can be made per user/IP
# Configure rate limiting for /delete-account or similar endpoints
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block suspicious account deletion requests
- Enable detailed logging for all account deletion operations and monitor for unauthorized attempts
🔍 How to Verify
Check if Vulnerable:
Test if unauthorized users can delete accounts by crafting requests to account deletion endpoints without proper authorization.Check Version:
Check flaskBlog version in configuration files or via application interfaceVerify Fix Applied:
Verify that only authorized users with appropriate permissions can delete accounts after implementing fixes.📡 Detection & Monitoring
Log Indicators:
- Multiple account deletion requests from single user/IP
- Account deletion requests without proper authentication/authorization headers
- Failed authorization attempts on deletion endpoints
Network Indicators:
- Unusual patterns of DELETE or POST requests to account management endpoints
- Requests bypassing normal authentication flows
SIEM Query:
source="flaskBlog" AND (event="account_deletion" OR endpoint="/delete-account") AND user_role!="admin"