VulnerabilityModified
CVE-2021-32741
This may have allowed an attacker to enumerate potentially valid share tokens.
MEDIUM 5.3EPSS 1.32%
Does this matter?
Lower severity and a low EPSS score (1.32%). Track it; it rarely justifies an emergency change on its own.
Description
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
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 1.32% probability · 69th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-799
- Affected
- nextcloud/nextcloud server
- Source
- security-advisories@github.com
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvrThird Party Advisory
- https://github.com/nextcloud/server/pull/26958Patch, Third Party Advisory
- https://hackerone.com/reports/1192144Permissions Required
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvrThird Party Advisory
- https://github.com/nextcloud/server/pull/26958Patch, Third Party Advisory
- https://hackerone.com/reports/1192144Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.