CVE-2023-49790: App PIN code can be bypassed in Nextcloud Files iOS

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-22 · updated 2026-06-17
Weakness: CWE-287

Description

The Nextcloud iOS Files app allows users of iOS to interact with Nextcloud, a self-hosted productivity platform. Prior to version 4.9.2, the application can be used without providing the 4 digit PIN code. Nextcloud iOS Files app should be upgraded to 4.9.2 to receive the patch. No known workarounds are available.

Affected products

com.nextcloud.client: before 4.9.2 — fixed in 4.9.2

How to fix

Upgrade to a fixed version: com.nextcloud.client 4.9.2. Check the vendor advisory for mitigations.

References

https://github.com/nextcloud/ios/pull/2665
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j8g7-88vv-rggv
https://hackerone.com/reports/2245437
https://github.com/nextcloud/ios/pull/2665
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j8g7-88vv-rggv
https://hackerone.com/reports/2245437

Get alerted when CVE-2023-49790 or the next vulnerability affects your stack