CVE-2025-70050 Overview
A cleartext storage of sensitive information vulnerability (CWE-312) has been identified in LessPass v9.6.9. This security flaw allows attackers to obtain sensitive information by exploiting improper handling of confidential data storage. LessPass is a stateless password manager that generates unique passwords based on a master password and site information, making the exposure of sensitive data particularly concerning for users relying on this tool for credential management.
Critical Impact
Attackers can obtain sensitive information due to cleartext storage practices, potentially compromising user credentials and password generation secrets.
Affected Products
- LessPass v9.6.9
Discovery Timeline
- 2026-03-09 - CVE-2025-70050 published to NVD
- 2026-03-11 - Last updated in NVD database
Technical Details for CVE-2025-70050
Vulnerability Analysis
The vulnerability stems from improper handling of sensitive information storage within LessPass v9.6.9. CWE-312 (Cleartext Storage of Sensitive Information) describes a condition where the application stores sensitive data in an unencrypted form, making it accessible to attackers who gain access to the storage location. In the context of a password manager like LessPass, this represents a significant security concern as the tool is specifically designed to protect user credentials.
The network-accessible nature of this vulnerability means attackers can potentially exploit it remotely, though user interaction is required for successful exploitation. The primary impact relates to availability concerns according to the vulnerability assessment.
Root Cause
The root cause of this vulnerability is the storage of sensitive information in cleartext format within the LessPass application. Rather than encrypting or properly obfuscating sensitive data before storage, the application leaves this information in a readable state. This implementation oversight violates fundamental security principles for credential management applications, where sensitive data should always be encrypted at rest.
Attack Vector
The attack vector is network-based, requiring some form of user interaction to exploit successfully. An attacker with access to the storage location where LessPass stores its data could read sensitive information directly without needing to bypass encryption or other protective mechanisms. This could include:
- Reading configuration files or local storage containing sensitive parameters
- Intercepting data during synchronization operations
- Accessing browser extension storage or application data directories
For technical details regarding this vulnerability, refer to the GitHub Gist analysis provided by the security researcher.
Detection Methods for CVE-2025-70050
Indicators of Compromise
- Unexpected access to LessPass configuration files or local storage locations
- Unauthorized read operations on application data directories
- Evidence of data exfiltration from browser extension storage
- Anomalous file system access patterns targeting LessPass-related files
Detection Strategies
- Monitor file system access to LessPass application data directories for unauthorized read operations
- Implement logging for access attempts to browser extension storage locations
- Review access logs for suspicious patterns targeting configuration files
- Deploy file integrity monitoring on sensitive application storage locations
Monitoring Recommendations
- Enable verbose logging for file system operations in environments where LessPass is deployed
- Implement alerting for bulk read operations on LessPass storage locations
- Monitor for unusual network traffic patterns that may indicate data exfiltration
- Regularly audit access permissions on directories containing LessPass data
How to Mitigate CVE-2025-70050
Immediate Actions Required
- Verify the version of LessPass in use and determine if you are running the affected v9.6.9 version
- Restrict access permissions to LessPass storage locations to minimize exposure
- Consider temporarily discontinuing use of the affected version until a patch is available
- Rotate any credentials that may have been generated or stored using the vulnerable version
- Monitor the LessPass GitHub repository for security updates
Patch Information
At the time of publication, check the LessPass project repository for updated versions that address this cleartext storage vulnerability. Users should upgrade to a patched version as soon as one becomes available.
Workarounds
- Limit file system permissions on LessPass data directories to the minimum necessary
- Avoid using LessPass on shared or untrusted systems where storage locations may be accessible to other users
- Consider using full-disk encryption to add an additional layer of protection for stored data
- Regularly clear browser extension data and local storage if persistence is not required
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
