CVE-2025-51667: Ryansu Simple Admin SQLi Vulnerability

CVE-2025-51667 Overview

A SQL injection vulnerability has been discovered in simple-admin-core, a popular administrative management system. The vulnerability exists in the /sys-api/role/update interface within versions 1.2.0 through 1.6.7. This limited SQL injection flaw may allow attackers to extract partial sensitive data from the database or disrupt normal system operations.

Critical Impact

Attackers can exploit this SQL injection vulnerability via network-based attacks to potentially leak sensitive data or cause disruption to system operations without requiring authentication.

Affected Products

• Ryansu Simple Admin versions 1.2.0 through 1.6.7
• simple-admin-core component with vulnerable /sys-api/role/update endpoint

Discovery Timeline

• 2025-08-27 - CVE-2025-51667 published to NVD
• 2025-09-09 - Last updated in NVD database

Technical Details for CVE-2025-51667

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), a well-known class of web application security flaws. The /sys-api/role/update interface in simple-admin-core fails to properly sanitize user-supplied input before incorporating it into SQL queries. While described as a "limited" SQL injection, the vulnerability still poses significant risk as it can be exploited remotely without requiring prior authentication.

The attack complexity is considered high, suggesting that successful exploitation requires specific conditions or advanced techniques. However, once exploited, the vulnerability primarily impacts data confidentiality with secondary effects on data integrity and system availability.

Root Cause

The root cause stems from improper input validation in the role update API endpoint. User-controlled parameters passed to the /sys-api/role/update interface are not adequately sanitized or parameterized before being included in database queries. This allows malicious SQL syntax to be injected and executed by the database engine, potentially bypassing intended query logic.

Attack Vector

The vulnerability is exploitable over the network, targeting the /sys-api/role/update API endpoint. An attacker would craft malicious HTTP requests containing SQL injection payloads in the parameters processed by this endpoint. Although no authentication is required, the high attack complexity indicates that successful exploitation may require specific timing, configuration states, or carefully crafted payloads.

The exploitation mechanism involves sending specially crafted input to the role update interface that includes SQL metacharacters or statements. When the application processes this input without proper sanitization, the injected SQL commands are executed against the backend database. Technical details and proof-of-concept information can be found in the GitHub Gist PoC and the GitHub Issue Discussion.

Detection Methods for CVE-2025-51667

Indicators of Compromise

• Unusual or malformed requests to the /sys-api/role/update endpoint containing SQL metacharacters such as single quotes, semicolons, or SQL keywords
• Database error messages in application logs indicating SQL syntax errors from the role update functionality
• Unexpected database query patterns or anomalous data access from the application service account
• Evidence of data exfiltration attempts through error-based or time-based SQL injection techniques

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the /sys-api/role/update endpoint
• Deploy application-level logging to capture all requests to the vulnerable endpoint with full parameter details
• Configure database audit logging to monitor for unusual query patterns or unauthorized data access attempts
• Utilize intrusion detection systems (IDS) with signatures for SQL injection attack patterns

Monitoring Recommendations

• Monitor HTTP request logs for the /sys-api/role/update endpoint, specifically watching for SQL injection payloads in request parameters
• Set up alerts for database errors originating from the simple-admin-core application that may indicate exploitation attempts
• Track database query execution times to detect potential time-based blind SQL injection attacks
• Review authentication logs for patterns suggesting automated exploitation attempts against the vulnerable endpoint

How to Mitigate CVE-2025-51667

Immediate Actions Required

• Upgrade simple-admin-core to a version newer than 1.6.7 that addresses this vulnerability
• Implement input validation and parameterized queries for all database operations in the role update functionality
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules as an interim mitigation
• Review and restrict network access to the administrative API endpoints to trusted sources only

Patch Information

Organizations running simple-admin-core versions 1.2.0 through 1.6.7 should consult the GitHub Issue Discussion for the latest remediation guidance from the vendor. It is recommended to upgrade to the latest available version that addresses this SQL injection vulnerability in the /sys-api/role/update interface.

Workarounds

• Restrict access to the /sys-api/role/update endpoint to trusted IP addresses or authenticated administrative users only using network-level controls
• Implement a reverse proxy or WAF rule that blocks requests containing SQL injection patterns to the affected endpoint
• Disable or remove the role update functionality if not critical to operations until a patch can be applied
• Apply database-level controls such as least privilege access for the application database user to limit potential impact

# Example WAF rule to block SQL injection patterns (ModSecurity format)
# Add to your ModSecurity configuration
SecRule ARGS "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    msg:'SQL Injection Attack Detected on role update endpoint',\
    chain"
SecRule REQUEST_URI "@contains /sys-api/role/update"