CVE-2025-10644: Wondershare Repairit Auth Bypass Flaw

CVE-2025-10644 Overview

CVE-2025-10644 is an authentication bypass vulnerability in Wondershare Repairit resulting from incorrect permission assignment in SAS (Shared Access Signature) tokens. This flaw allows remote attackers to bypass authentication mechanisms without requiring any prior authentication credentials.

The vulnerability stems from overly permissive SAS token configurations, which can be leveraged by attackers to launch supply-chain attacks and execute arbitrary code on customer endpoints. This represents a significant security risk as it enables unauthenticated remote exploitation with potential for widespread impact across the user base.

Critical Impact

Remote attackers can bypass authentication and execute arbitrary code on customer endpoints through supply-chain attack vectors without requiring any prior authentication.

Affected Products

• Wondershare Repairit version 6.5.2
• Wondershare Repairit (all vulnerable versions prior to patch)

Discovery Timeline

• 2025-09-17 - CVE-2025-10644 published to NVD
• 2025-09-19 - Last updated in NVD database

Technical Details for CVE-2025-10644

Vulnerability Analysis

This vulnerability is classified under CWE-266 (Incorrect Privilege Assignment), indicating a fundamental flaw in how permissions are granted to SAS tokens within the Wondershare Repairit application. The vulnerability allows unauthenticated attackers to exploit the misconfigured tokens over the network, requiring no user interaction or special privileges.

The attack can be initiated remotely across the network and presents low complexity for exploitation. When successfully exploited, attackers gain high-level access to both confidentiality and integrity of the affected system, with some impact on availability. The supply-chain attack potential makes this particularly dangerous, as compromised tokens could be used to distribute malicious payloads to downstream customers.

Root Cause

The root cause lies in the incorrect permission assignment to SAS tokens within the Wondershare Repairit application. SAS tokens are designed to provide delegated access to resources with specific permissions, but in this case, the tokens are granted excessive privileges that should not be available to unauthenticated users. This misconfiguration allows attackers to abuse the overly permissive tokens to bypass authentication controls entirely.

Attack Vector

The attack vector is network-based (AV:N), meaning attackers can exploit this vulnerability remotely without physical access to the target system. The attack requires:

• No authentication - Attackers do not need valid credentials
• No user interaction - The vulnerability can be exploited without any action from legitimate users
• Low complexity - The attack is straightforward to execute once the vulnerability is understood

An attacker exploiting this vulnerability could intercept or forge SAS tokens with elevated permissions, then use these tokens to bypass authentication mechanisms. This access can then be leveraged to inject malicious code into the software supply chain, ultimately executing arbitrary code on customer endpoints that trust the compromised distribution channel.

The vulnerability was reported through the Zero Day Initiative as ZDI-CAN-26892. For detailed technical information, refer to the Zero Day Initiative Advisory ZDI-25-896.

Detection Methods for CVE-2025-10644

Indicators of Compromise

• Unusual SAS token usage patterns or tokens with unexpected permission scopes
• Authentication bypass attempts or unauthorized access to Wondershare Repairit services
• Unexpected code execution or binary modifications on endpoints running Repairit
• Anomalous network connections to Wondershare cloud infrastructure from unauthorized sources

Detection Strategies

• Monitor authentication logs for bypass attempts or access without valid credentials
• Implement network traffic analysis to detect abnormal SAS token exchanges
• Deploy endpoint detection and response (EDR) solutions to identify unauthorized code execution
• Review cloud service logs for SAS token operations with elevated permissions

Monitoring Recommendations

• Enable verbose logging for all authentication-related events in Wondershare Repairit
• Configure SIEM alerts for authentication anomalies and supply-chain indicators
• Monitor file integrity on endpoints for unauthorized modifications to Repairit binaries
• Track network connections to and from Repairit application components for suspicious activity

How to Mitigate CVE-2025-10644

Immediate Actions Required

• Update Wondershare Repairit to the latest patched version as soon as available
• Review and audit all SAS token configurations for proper permission scoping
• Implement network segmentation to limit exposure of vulnerable endpoints
• Consider temporarily disabling cloud-based features until patches are applied
• Deploy EDR solutions to detect and prevent arbitrary code execution

Patch Information

Organizations should monitor Wondershare's official channels and the Zero Day Initiative Advisory ZDI-25-896 for patch availability and detailed remediation guidance. Apply security updates immediately upon release to address this authentication bypass vulnerability.

Workarounds

• Restrict network access to Wondershare Repairit services using firewall rules
• Implement application allowlisting to prevent unauthorized code execution
• Use network monitoring to detect and block suspicious SAS token activity
• Consider air-gapping critical systems that cannot be immediately patched
• Deploy web application firewalls (WAF) to filter malicious requests targeting the vulnerable component