CVE-2023-30540 : What You Need to Know
Discover how CVE-2023-30540 impacts Nextcloud Talk, allowing unauthorized access to chat poll data even after purging history. Learn about the vulnerability, affected systems, and mitigation steps.
A chat poll data exposure vulnerability has been identified in Nextcloud Talk, allowing access to sensitive information even after purging conversation history. Explore the impact, technical details, and mitigation strategies for CVE-2023-30540.
Understanding CVE-2023-30540
Nextcloud Talk, a chat, video & audio call extension, in specific versions, allows unauthorized access to deleted data by users added later to a conversation.
What is CVE-2023-30540?
The vulnerability in Nextcloud Talk enables users to query chat poll data from the API after the conversation history has been purged, exposing sensitive information to unauthorized actors.
The Impact of CVE-2023-30540
The exposure of sensitive information poses a low severity risk with a CVSS base score of 3.5. An attacker can access deleted data, potentially compromising user privacy and confidentiality.
Technical Details of CVE-2023-30540
The vulnerability description, affected systems, and exploitation mechanism of CVE-2023-30540 are outlined below.
Vulnerability Description
In affected versions of Nextcloud Talk, users added later to a conversation can exploit the flaw to retrieve purged chat poll data, leading to exposure of sensitive information. This issue has been addressed in version 15.0.5.
Affected Systems and Versions
- Vendor: Nextcloud
- Product: Security Advisories
- Affected Versions: >= 15.0.0, < 15.0.5
Exploitation Mechanism
Users with access to the API can utilize this vulnerability to retrieve sensitive information even after the conversation history has been purged.
Mitigation and Prevention
Learn how to protect your systems and data from CVE-2023-30540 with immediate and long-term security measures.
Immediate Steps to Take
- Upgrade Nextcloud Talk to version 15.0.5 to patch the vulnerability.
Long-Term Security Practices
- Regularly update software to stay protected against known vulnerabilities.
- Educate users on secure communication practices to minimize data exposure risks.
Patching and Updates
Stay informed about security advisories and apply patches promptly to safeguard your systems from potential threats.