How severe is CVE-2023-28646?

CVE-2023-28646 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over physical access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-28646 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28646?

CVE-2023-28646 affects Nextcloud. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-28646?

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

When was CVE-2023-28646 published?

CVE-2023-28646 was published on 2023-03-30 and last updated on 2026-06-17.

CVE-2023-28646

CVE-2023-28646 is a medium-severity vulnerability in Nextcloud with a CVSS 3.x base score of 4.4. 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-281.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-281
Affected product: Nextcloud
Published: 2023-03-30
Last modified: 2026-06-17

Description

Nextcloud android is an android app for interfacing with the nextcloud home server ecosystem. In versions from 3.7.0 and before 3.24.1 an attacker that has access to the unlocked physical device can bypass the Nextcloud Android Pin/passcode protection via a thirdparty app. This allows to see meta information like sharer, sharees and activity of files. It is recommended that the Nextcloud Android app is upgraded to 3.24.1. There are no known workarounds for this vulnerability.

Frequently asked questions

What is CVE-2023-28646?: Nextcloud android is an android app for interfacing with the nextcloud home server ecosystem. In versions from 3.7.0 and before 3.24.1 an attacker that has access to the unlocked physical device can bypass the Nextcloud Android Pin/passcode protection via a thirdparty app. This allows to see meta information like sharer, sharees and activity of files. It is recommended that the Nextcloud Android app is upgraded to 3.24.1. There are no known workarounds for this vulnerability.
How severe is CVE-2023-28646?: CVE-2023-28646 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over physical access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-28646 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28646?: CVE-2023-28646 affects Nextcloud. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-28646?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-28646 published?: CVE-2023-28646 was published on 2023-03-30 and last updated on 2026-06-17.

References

Affected products (1)

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

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