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CVE-2023-39957

7.8 · HIGH

Nextcloud Talk Android allows users to place video and audio calls through Nextcloud on Android.

Published Aug 10, 2023CWE-22EPSS 0.37%

Overview

CVE-2023-39957 is a high-severity vulnerability. It was published on August 10, 2023 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Nextcloud Talk Android allows users to place video and audio calls through Nextcloud on Android. Prior to version 17.0.0, an unprotected intend allowed malicious third party apps to trick the Talk Android app into writing files outside of its intended cache directory. Nextcloud Talk Android version 17.0.0 has a patch for this issue. No known workarounds are available.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-36f7-93f3-mcfjGitHubgithub.com/nextcloud/talk-android/pull/3064Refhackerone.com/reports/1997029GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-36f7-93f3-mcfjGitHubgithub.com/nextcloud/talk-android/pull/3064Refhackerone.com/reports/1997029

How CyberStrike helps

Frequently asked questions

What is CVE-2023-39957?

CVE-2023-39957 is a high-severity vulnerability. It was published on August 10, 2023 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-39957?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-39957?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-39957?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-39957 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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