How severe is CVE-2021-22905?

CVE-2021-22905 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-22905 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22905?

CVE-2021-22905 affects Nextcloud. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22905?

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

When was CVE-2021-22905 published?

CVE-2021-22905 was published on 2021-06-11 and last updated on 2026-06-17.

CVE-2021-22905

CVE-2021-22905 is a medium-severity vulnerability in Nextcloud with a CVSS 3.x base score of 6.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Nextcloud
Published: 2021-06-11
Last modified: 2026-06-17

Description

Nextcloud Android App (com.nextcloud.client) before v3.16.0 is vulnerable to information disclosure due to searches for sharees being performed by default on the lookup server instead of only using the local Nextcloud server unless a global search has been explicitly chosen by the user.

Frequently asked questions

What is CVE-2021-22905?: Nextcloud Android App (com.nextcloud.client) before v3.16.0 is vulnerable to information disclosure due to searches for sharees being performed by default on the lookup server instead of only using the local Nextcloud server unless a global search has been explicitly chosen by the user.
How severe is CVE-2021-22905?: CVE-2021-22905 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-22905 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22905?: CVE-2021-22905 affects Nextcloud. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22905?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22905 published?: CVE-2021-22905 was published on 2021-06-11 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Nextcloud

CVE-2019-5454 — Critical (CVSS 9.8): SQL Injection in the Nextcloud Android app prior to version 3.0.0 allows to destroy a local cache when a harmful query…
CVE-2021-43863 — High (CVSS 7.5): The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. The Nextcloud…
CVE-2023-28999 — Medium (CVSS 6.9): Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app…
CVE-2019-5455 — Medium (CVSS 6.8): Bypassing lock protection exists in Nextcloud Android app 3.6.0 when creating a multi-account and aborting the process.
CVE-2019-5450 — Medium (CVSS 6.8): Improper sanitization of HTML in directory names in the Nextcloud Android app prior to version 3.7.0 allowed to style…
CVE-2021-22912 — Medium (CVSS 6.5): Nextcloud iOS before 3.4.2 suffers from an information disclosure vulnerability when searches for sharees utilize the…

All CVEs affecting Nextcloud →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →