CVE-2021-32741

Lack of ratelimit on public share link mount endpoint

CVSS 5.3 MEDIUMEPSS 1.3%CWE-799

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 1.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

12 Jul 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

nextcloud · security-advisories

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References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvr https://github.com/nextcloud/server/pull/26958 https://hackerone.com/reports/1192144