Path Traversal in Nextcloud Security-Advisories
CVE-2023-39957
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Nextcloud Security-Advisories — versions < 17.0.0
- Nextcloud Talk — versions 17.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-36f7-93f3-mcfj (Patch, Vendor Advisory)
- github.com/nextcloud/talk-android/pull/3064 (Patch)
- hackerone.com/reports/1997029 (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2023-39957?
- CVE-2023-39957 is a high-severity vulnerability in Nextcloud Security-Advisories, classified under Path Traversal. CVSS score: 7.8/10. Published 2023-08-10.
- How severe is CVE-2023-39957?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-39957 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.