CVE-2025-6967: Sarman Soft CMS Auth Bypass Vulnerability

CVE-2025-6967 Overview

CVE-2025-6967 is an Execution After Redirect (EAR) vulnerability discovered in Sarman Soft Software and Technology Services Industry and Trade Ltd. Co. CMS. This vulnerability enables attackers to exploit JSON Hijacking (also known as JavaScript Hijacking) and achieve Authentication Bypass. The vulnerability affects CMS versions through 10022026.

The vendor was contacted early about this disclosure but did not respond, leaving users without an official patch or mitigation guidance from the manufacturer.

Critical Impact

This vulnerability allows unauthenticated attackers to bypass authentication mechanisms and hijack JSON data through network-based attacks, potentially compromising sensitive user information and system access controls.

Affected Products

• Sarman Soft CMS through version 10022026

Discovery Timeline

• 2026-02-10 - CVE-2025-6967 published to NVD
• 2026-02-10 - Last updated in NVD database

Technical Details for CVE-2025-6967

Vulnerability Analysis

Execution After Redirect (EAR) vulnerabilities occur when a web application continues to execute code after issuing a redirect instruction to the browser. In the case of CVE-2025-6967, the Sarman Soft CMS fails to properly terminate execution after sending HTTP redirect responses, allowing subsequent code to execute and potentially expose sensitive data or functionality.

This EAR condition enables two distinct attack vectors: JSON Hijacking and Authentication Bypass. JSON Hijacking exploits the application's tendency to return sensitive data in JSON format even after a redirect has been issued. When combined with the authentication bypass capability, attackers can access protected resources without valid credentials by intercepting the response data that continues to be processed after the redirect.

The network-based attack vector with no user interaction required makes this vulnerability particularly dangerous in internet-facing deployments of the CMS.

Root Cause

The root cause of this vulnerability is classified under CWE-698 (Execution After Redirect). The application fails to call appropriate termination functions (such as exit() or die()) after issuing redirect headers. This oversight allows the server-side code to continue processing the request and potentially returning sensitive data in the response body, even though the client browser would normally follow the redirect and disregard this data.

Attackers can leverage automated tools or custom scripts to capture and parse the full HTTP response, including any data transmitted after the redirect header, thereby accessing information or functionality that should be protected by the redirect-based access control mechanism.

Attack Vector

The attack vector for this vulnerability is network-based and requires no privileges or user interaction. An attacker can exploit this vulnerability by:

1. Sending crafted HTTP requests to the vulnerable CMS endpoints
2. Intercepting the full HTTP response before the browser processes the redirect
3. Extracting sensitive JSON data or session information from the response body
4. Using the captured data to bypass authentication and access protected resources

The vulnerability enables JSON Hijacking by allowing attackers to steal sensitive data returned in JSON format through cross-origin requests when proper security headers are not enforced. The authentication bypass component allows attackers to access restricted functionality by exploiting the continued execution of authentication-check code after redirect issuance.

Detection Methods for CVE-2025-6967

Indicators of Compromise

• Unusual HTTP traffic patterns showing requests to CMS endpoints that receive redirect responses with unexpectedly large response bodies
• Authentication logs showing successful access to protected resources without corresponding valid login events
• Anomalous cross-origin requests targeting JSON API endpoints
• Web server logs containing requests that bypass normal authentication flows

Detection Strategies

• Monitor HTTP response sizes for redirect responses (3xx status codes) that contain substantial body content
• Implement web application firewall (WAF) rules to detect and alert on potential JSON hijacking patterns
• Review access logs for authentication anomalies where protected resources are accessed without prior successful authentication
• Deploy SentinelOne Singularity to detect and respond to suspicious web application behavior in real-time

Monitoring Recommendations

• Enable detailed logging on all CMS authentication endpoints and redirect handlers
• Configure alerts for redirect responses that include JSON content in the response body
• Monitor for unusual session creation patterns that bypass normal login workflows
• Implement network traffic analysis to detect cross-origin JSON requests targeting the CMS

How to Mitigate CVE-2025-6967

Immediate Actions Required

• Restrict network access to the affected CMS to trusted IP ranges until a patch is available
• Implement a web application firewall (WAF) to filter malicious requests targeting authentication endpoints
• Review and audit current CMS access logs for signs of exploitation
• Consider temporarily disabling or isolating the affected CMS if business operations allow

Patch Information

No official patch is currently available from Sarman Soft Software and Technology Services Industry and Trade Ltd. Co. The vendor was contacted early about this disclosure but did not respond in any way. Organizations using this CMS should monitor the USOM Security Notification TR-26-0050 for updates and consider alternative CMS solutions if no patch becomes available.

Workarounds

• Implement server-side code modifications to ensure execution terminates immediately after redirect headers are sent (add exit() or die() calls after redirect statements)
• Configure reverse proxy or WAF rules to strip response body content from redirect responses
• Implement additional authentication layers such as IP whitelisting or multi-factor authentication for sensitive CMS functions
• Deploy network segmentation to limit exposure of the CMS to untrusted networks