Home/CVE/Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, the
CVE

CVE-2021-32741

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, the

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public share link mount endpoint. This may have allowed an attacker to enumerate potentially valid share tokens.

The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

MEDIUM · CVSS 5.3 EPSS 0.0034
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-799Improper Control of Interaction Frequency
▤

Affected Products & Versions

3
nextcloud server< 19.0.13
nextcloud server>= 20.0.0 and < 20.0.11
nextcloud server>= 21.0.0 and < 21.0.3
▣

Scoring & Timeline

5.3
MEDIUM · 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 NVD12 Jul 2021 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
⚑

Vendor Advisories

1
suse-csafopenSUSE-SU-2021:1068-1
🔗

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-crvj-vmf7-xrvrThird Party Advisory
https://github.com/nextcloud/server/pull/26958PatchThird Party Advisory
https://hackerone.com/reports/1192144Permissions Required
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