Vulnerability CVE-2021-41256
Published: 2021-11-30

Description:
nextcloud news-android is an Android client for the Nextcloud news/feed reader app. In affected versions the Nextcloud News for Android app has a security issue by which a malicious application installed on the same device can send it an arbitrary Intent that gets reflected back, unintentionally giving read and write access to non-exported Content Providers in Nextcloud News for Android. Users should upgrade to version 0.9.9.63 or higher as soon as possible.

Type:

CWE-829

 (Inclusion of Functionality from Untrusted Control Sphere)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.8/10
4.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Nextcloud -> NEWS 

 References:
https://github.com/nextcloud/news-android/commit/05449cb666059af7de2302df9d5c02997a23df85
https://github.com/nextcloud/news-android/blob/master/security/GHSL-2021-1033_Nextcloud_News_for_Android.md
https://github.com/nextcloud/news-android/security/advisories/GHSA-2q9v-q3cc-h9f3
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