CVE-2021-22905

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-11 · updated 2026-06-17
Weakness: CWE-200

Description

Nextcloud Android App (com.nextcloud.client) before v3.16.0 is vulnerable to information disclosure due to searches for sharees being performed by default on the lookup server instead of only using the local Nextcloud server unless a global search has been explicitly chosen by the user.

Affected products

com.nextcloud.client: before 3.16.0 — fixed in 3.16.0

How to fix

Upgrade to a fixed version: com.nextcloud.client 3.16.0. Check the vendor advisory for mitigations.

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-22v9-q3r6-x7cj
https://hackerone.com/reports/1167916
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-22v9-q3r6-x7cj
https://hackerone.com/reports/1167916

Get alerted when CVE-2021-22905 or the next vulnerability affects your stack