CVE-2021-32802

published 2021-09-07

CVE-2021-32802: Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image…

Priority P3 56 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image types, the Nextcloud server was invoking a third-party library that wasn't suited for untrusted user-supplied content. There are several security concerns with passing user-generated content to this library, such as Server-Side-Request-Forgery, file disclosure or potentially executing code on the system. The risk depends on your system configuration and the installed library version. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. These versions do not use this library anymore. As a workaround users may disable previews by setting `enable_previews` to `false` in `config.php`.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
nextcloud	nextcloud_server	< 20.0.12	20.0.12
nextcloud	nextcloud_server	>= 21.0.0 < 21.0.4	21.0.4
nextcloud	nextcloud_server	>= 22.0.0 < 22.1.0	22.1.0
nextcloud	security-advisories	< 20.0.12	20.0.12
nextcloud	security-advisories	—	—
nextcloud	security-advisories	—	—

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

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CWE-829