CVE-2021-32688 is a critical vulnerability affecting Nextcloud Server versions prior to 19.0.13, 20.0.11, and 21.0.3. It allows application-specific authentication tokens, even those initially configured without filesystem access, to elevate their own permissions and gain full filesystem access due to a missing permission check. This vulnerability carries a CVSS score of 8.8 (HIGH), indicating a low-complexity attack that can lead to high impact on confidentiality, integrity, and availability if exploited over a network by a low-privileged attacker. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed on CISA's KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 19.0.13CPE matchmatch criteria | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | ||
>= 20.0.0, < 20.0.11CPE matchmatch criteria | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | ||
>= 21.0.0, < 21.0.3CPE matchmatch criteria | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.