CVE-2025-10912: TemizlikYolda Auth Bypass Vulnerability

CVE-2025-10912 Overview

CVE-2025-10912 is an Authorization Bypass Through User-Controlled Key vulnerability (CWE-639) affecting Saastech Cleaning and Internet Services Inc. TemizlikYolda application. This vulnerability allows attackers to manipulate user-controlled variables to bypass authorization controls, potentially gaining unauthorized access to resources or functionality that should be restricted.

The vulnerability exists because the application fails to properly validate user-supplied keys or identifiers before using them to authorize access to protected resources. This type of flaw, also known as Insecure Direct Object Reference (IDOR), enables attackers to access data or perform actions on behalf of other users by simply modifying parameter values.

Critical Impact

Attackers can bypass authorization controls by manipulating user-controlled key values, potentially accessing or modifying other users' data without proper authentication.

Affected Products

• TemizlikYolda (versions through 11022026)
• Saastech Cleaning and Internet Services Inc. web application

Discovery Timeline

• 2026-02-11 - CVE-2025-10912 published to NVD
• 2026-02-11 - Last updated in NVD database

Technical Details for CVE-2025-10912

Vulnerability Analysis

This Authorization Bypass vulnerability stems from improper access control implementation where the application relies on user-controllable input to make authorization decisions. The affected TemizlikYolda application accepts user-supplied identifiers (such as object IDs, user IDs, or resource keys) and uses them directly to retrieve or modify data without verifying that the authenticated user has legitimate access to the requested resource.

The vulnerability can be exploited over the network with low attack complexity, requiring only low-privilege access. While it does not directly compromise confidentiality, successful exploitation can lead to unauthorized modification of data (integrity impact) and potential disruption of service availability.

Root Cause

The root cause of CVE-2025-10912 is the application's failure to implement proper server-side authorization checks. Instead of validating whether the current user has permission to access a specific resource, the application trusts the user-provided key or identifier. This design flaw allows attackers to enumerate and access resources belonging to other users by simply changing parameter values in requests.

Attack Vector

The attack vector for this vulnerability is network-based, meaning it can be exploited remotely without physical access to the target system. An attacker with low-privilege access to the application can exploit this vulnerability by:

1. Authenticating to the application with valid credentials
2. Identifying API endpoints or application features that accept user-controllable identifiers
3. Modifying these identifiers (such as incrementing numeric IDs or substituting UUIDs) in HTTP requests
4. Accessing or manipulating resources belonging to other users

The vulnerability does not require user interaction, making it particularly dangerous for automated exploitation. Attackers can systematically enumerate and access all accessible resources by iterating through potential identifier values.

Detection Methods for CVE-2025-10912

Indicators of Compromise

• Unusual patterns of sequential or enumerated resource access attempts from a single user session
• HTTP requests containing modified object identifiers that differ from the authenticated user's expected resources
• Elevated error rates for authorization failures or "access denied" responses
• Log entries showing access to resources across multiple user accounts from a single IP or session

Detection Strategies

• Implement logging and monitoring for all authorization decision points in the application
• Configure Web Application Firewall (WAF) rules to detect parameter tampering patterns
• Deploy anomaly detection systems to identify unusual access patterns to user-specific resources
• Review application logs for evidence of horizontal privilege escalation attempts

Monitoring Recommendations

• Enable detailed audit logging for all resource access operations including the requesting user and target resource
• Monitor for sudden spikes in "unauthorized access" or "permission denied" errors
• Implement real-time alerting for access patterns that suggest systematic resource enumeration
• Establish baseline metrics for normal user behavior to facilitate anomaly detection

How to Mitigate CVE-2025-10912

Immediate Actions Required

• Review and audit all application endpoints that accept user-controllable identifiers
• Implement server-side authorization checks that verify user permissions before granting access to any resource
• Replace predictable identifiers (sequential integers) with cryptographically random UUIDs where feasible
• Apply the principle of least privilege to all user accounts and API access

Patch Information

The vendor (Saastech Cleaning and Internet Services Inc.) was contacted regarding this vulnerability but did not respond. As of the publication date, no official patch has been released for TemizlikYolda versions through 11022026. Organizations using this application should implement compensating controls and monitor for vendor updates.

For additional information, refer to the USOM Security Advisory.

Workarounds

• Implement additional authorization validation at the application or API gateway layer
• Deploy a Web Application Firewall with rules to detect and block parameter manipulation attempts
• Restrict access to sensitive functionality to trusted networks or VPN connections only
• Consider temporarily disabling affected features until a proper fix is available
• Implement rate limiting on API endpoints to slow down enumeration attacks

# Example WAF rule concept for ModSecurity to detect sequential ID enumeration
# Note: Adjust thresholds based on your application's normal usage patterns
SecRule REQUEST_URI "@rx /api/(user|resource|order)/[0-9]+" \
    "id:100001,phase:2,pass,nolog,setvar:ip.id_access=+1,expirevar:ip.id_access=60"
SecRule IP:ID_ACCESS "@gt 20" \
    "id:100002,phase:2,deny,status:429,msg:'Potential IDOR enumeration detected'"