Home/CVE/Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10,
CVE

CVE-2021-32653

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10,

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10, or 21.0.2 send user IDs to the lookup server even if the user has no fields set to published. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2.

no workarounds outside the updates are known to exist.

LOW · CVSS 2.7 EPSS 0.0038
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-201Insertion of Sensitive Information Into Sent Data
▤

Affected Products & Versions

3
nextcloud server< 19.0.11
nextcloud server>= 20.0.0 and < 20.0.10
nextcloud server>= 21.0.0 and < 21.0.2
▣

Scoring & Timeline

2.7
LOW · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Jun 2021 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-396j-vqpr-qg45Third Party Advisory
https://hackerone.com/reports/1173436Permissions RequiredThird Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory
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