Vulnerability · Published Jun 1, 2021 · Assigned by GitHub_M

CVE-2021-32657Malicious user could break user administration page

Medium 4.3

In plain English

A medium-severity uncontrolled resource consumption in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)1.8%top 21.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Nextcloud Server is a Nextcloud package that handles data storage. In versions of Nextcloud Server prior to 10.0.11, 20.0.10, and 21.0.2, a malicious user may be able to break the user administration page. This would disallow administrators to administrate users on the Nextcloud instance. The vulnerability is fixed in versions 19.0.11, 20.0.10, and 21.0.2. As a workaround, administrators can use the OCC command line tool to administrate the Nextcloud users.

Affected products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	< 19.0.11>= 20.0.0, < 20.0.10>= 21.0.0, < 21.0.2

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fx62-q47f-f665 x_refsource_CONFIRM
https://hackerone.com/reports/1147611 x_refsource_MISC
GLSA-202208-17 vendor-advisory, x_refsource_GENTOO