CVE-2021-22912

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 iOS before 3.4.2 suffers from an information disclosure vulnerability when searches for sharees utilize the lookup server by default instead of only on the local Nextcloud server unless a global search has been explicitly chosen by the user.

Affected products

com.nextcloud.client: before 3.4.2 — fixed in 3.4.2

How to fix

Upgrade to a fixed version: com.nextcloud.client 3.4.2. Check the vendor advisory for mitigations.

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m7w4-cvjr-76mh
https://hackerone.com/reports/1167919
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m7w4-cvjr-76mh
https://hackerone.com/reports/1167919

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