CVE-2023-39957: Nextcloud Talk

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Nextcloud Talk: before 17.0.0 (fixed in 17.0.0); version 17.0.0 only

Published 2023-08-10. Last modified 2026-06-17.