How severe is CVE-2021-41256?

CVE-2021-41256 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-41256 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41256?

CVE-2021-41256 affects Nextcloud News. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41256?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-41256 published?

CVE-2021-41256 was published on 2021-11-30 and last updated on 2026-06-17.

CVE-2021-41256

CVE-2021-41256 is a medium-severity vulnerability in Nextcloud News with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-829.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
CVSS v2: 5.8
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-829
Affected product: Nextcloud News
Published: 2021-11-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-41256?: 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.
How severe is CVE-2021-41256?: CVE-2021-41256 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-41256 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41256?: CVE-2021-41256 affects Nextcloud News. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41256?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41256 published?: CVE-2021-41256 was published on 2021-11-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:news:*:*:*:*:*:android:*:*

Other CWE-829 vulnerabilities

CVE-2026-1699 — Critical (CVSS 10.0): In the Eclipse Theia Website repository, the GitHub Actions workflow .github/workflows/preview.yml used…
CVE-2025-70974 — Critical (CVSS 10.0): Fastjson before 1.2.48 mishandles autoType because, when an @type key is in a JSON document, and the value of that key…
CVE-2025-0982 — Critical (CVSS 10.0): Sandbox escape in the JavaScript Task feature of Google Cloud Application Integration allows an actor to execute…
CVE-2021-41037 — Critical (CVSS 10.0): In Eclipse p2, installable units are able to alter the Eclipse Platform installation and the local machine via…
CVE-2022-1161 — Critical (CVSS 10.0): An attacker with the ability to modify a user program may change user program code on some ControlLogix, CompactLogix,…
CVE-2020-4561 — Critical (CVSS 10.0): IBM Cognos Analytics 11.0 and 11.1 DQM API allows submitting of all control requests in unauthenticated sessions. This…

Browse all CWE-829 vulnerabilities →