CVE-2025-5512
📋 TL;DR
This critical vulnerability in shiyi-blog allows attackers to bypass authentication in the administrator backend by exploiting improper authentication in the verifyPassword API endpoint. Attackers can remotely access the backend without valid credentials, potentially compromising the entire blog system. All users running shiyi-blog versions up to 1.2.1 are affected.
💻 Affected Systems
- quequnlong shiyi-blog
📦 What is this software?
Shiyi Blog by Quequnlong
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the blog system, allowing attackers to modify content, steal user data, inject malicious code, or take full administrative control of the application.
Likely Case
Unauthorized access to the administrator backend leading to content manipulation, user data exposure, and potential privilege escalation within the blog system.
If Mitigated
Limited impact with proper network segmentation and authentication controls, potentially only exposing backend interface but not critical data.
🎯 Exploit Status
Exploit details are publicly available in GitHub repositories, making this easily exploitable by attackers with basic knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor was contacted but did not respond. Consider upgrading to a forked or alternative version if available.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to the /api/sys/user/verifyPassword/ endpoint using firewall rules or web application firewall.
iptables -A INPUT -p tcp --dport 8080 -m string --string "/api/sys/user/verifyPassword/" --algo bm -j DROP
Authentication Layer Enhancement
allImplement additional authentication checks before the vulnerable endpoint or disable the endpoint entirely.
Modify application code to add session validation or IP whitelisting for admin endpoints
🧯 If You Can't Patch
- Implement network segmentation to isolate the shiyi-blog instance from critical systems
- Deploy a web application firewall (WAF) with rules to detect and block authentication bypass attempts
🔍 How to Verify
Check if Vulnerable:
Test if you can access /api/sys/user/verifyPassword/ endpoint without proper authentication or with crafted requests that bypass authentication.Check Version:
Check application configuration files or admin panel for version information, typically in pom.xml or application.properties for Java applications.Verify Fix Applied:
Verify that authentication bypass attempts to the verifyPassword endpoint are properly rejected and logged.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful access to admin endpoints
- Unusual access patterns to /api/sys/user/verifyPassword/ endpoint
Network Indicators:
- HTTP requests to /api/sys/user/verifyPassword/ with unusual parameters or without proper authentication headers
SIEM Query:
source="web_logs" AND uri="/api/sys/user/verifyPassword/" AND (status=200 OR status=302) AND NOT (user_agent contains "monitoring" OR src_ip in [admin_ips])