What’s Vulnerable › Vulnerabilities

CVE-2021-32695: Malicious Android app could access Shared Preferences of the Nextcloud Android client

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-17 · updated 2026-06-17
• Weakness: CWE-200

Description

Nextcloud Android app is the Android client for Nextcloud. In versions prior to 3.16.1, a malicious app on the same device could have gotten access to the shared preferences of the Nextcloud Android application. This required user-interaction as a victim had to initiate the sharing flow and choose the malicious app. The shared preferences contain some limited private data such as push tokens and the account name. The vulnerability is patched in version 3.16.1.

Affected products

• com.nextcloud.client: before 3.16.1 — fixed in 3.16.1

How to fix

Upgrade to a fixed version: com.nextcloud.client 3.16.1. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/android/pull/8433
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-25m9-cf6c-qf2c
• https://hackerone.com/reports/1142918
• https://github.com/nextcloud/android/pull/8433
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-25m9-cf6c-qf2c
• https://hackerone.com/reports/1142918

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