CVE-2023-39957

Name: CVE-2023-39957
Creator: NVD / NIST
Published: 2023-08-10T16:15:09.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2023-39957 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.33%

24.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions	Update
Nextcloud	Talk	< 17.0.0	—
Nextcloud	Talk	17.0.0	Rc1

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-36f7-93f3-mcfjPatch, Vendor Advisory
https://github.com/nextcloud/talk-android/pull/3064Patch
https://hackerone.com/reports/1997029Issue Tracking, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-36f7-93f3-mcfjPatch, Vendor Advisory
https://github.com/nextcloud/talk-android/pull/3064Patch
https://hackerone.com/reports/1997029Issue Tracking, Third Party Advisory

Timeline

Published: Aug 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-39957?

How severe is CVE-2023-39957?

CVE-2023-39957 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39957?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-39957?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST