What is CVE-2021-22905?

CVE-2021-22905 is a medium-severity vulnerability in Nextcloud, classified under Information Disclosure. CVSS score: 6.5/10. Published 2021-06-11.

How severe is CVE-2021-22905?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-22905 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Information disclosure in Nextcloud

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.

Vulnerability class: Information Disclosure

EPSS: 0.014 (69.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Nextcloud
N/a Nextcloud Android App (Com.nextcloud.client) — versions Fixed in 3.16.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

Public proof-of-concept exploits

un1x01d/scripts

References

support@hackerone.com (Third Party Advisory, x_refsource_MISC)
support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-22905?: CVE-2021-22905 is a medium-severity vulnerability in Nextcloud, classified under Information Disclosure. CVSS score: 6.5/10. Published 2021-06-11.
How severe is CVE-2021-22905?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-22905 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.