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TI-2021-15504 Aliases CVE-2021-37629

Lack of ratelimit on Richdocuments OCS endpoint in nextcloud

Priority LOW 27CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure, Denial of service
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-770.

Summary

Nextcloud Richdocuments is an open source collaborative office suite. In affected versions there is a lack of rate limiting on the Richdocuments OCS endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. It is recommended that the Nextcloud Richdocuments app is upgraded to either 3.8.4 or 4.2.1 to resolve. For users unable to upgrade it is recommended that the Richdocuments application be disabled.

Why it matters now

EPSS 0.0138 72nd percentileScored 2026-11-07
Fix Fixed security-advisories (nextcloud): 3.8.4, 4.2.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisoriesbefore 3.8.4; 4.0.0 to before 4.2.13.8.4, 4.2.1Patch availableCNA
  • security-advisories Vendornextcloud Affected before 3.8.4; 4.0.0 to before 4.2.1 Fixed in 3.8.4, 4.2.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:*before 3.8.4; 4.0.0 to before 4.2.1Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:* Versions before 3.8.4; 4.0.0 to before 4.2.1 Vulnerable ·nextcloud

Remediation

  • Fix · CNA security-advisories (nextcloud) Fixed in 3.8.4, 4.2.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-37629

References

Advisory 3

  • TI-2021-15503 File Drop can be bypassed using Richdocuments app in nextcloud CVSS 3.1HIGH 7.5
  • TI-2023-13163 Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments CVSS 3.1MEDIUM 6.5
  • TI-2022-13069 Federated editing allows iframing remote servers by default in richdocuments CVSS 3.1MEDIUM 6.5
  • TI-2023-10612 Document content of files can be obtained through Collabora for files of other users CVSS 3.1MEDIUM 5.8
  • TI-2021-16608 File path disclosure of shared files in Richdocuments application CVSS 3.1MEDIUM 5.3
  • TI-2023-10621 Nextcloud Server previews are accessible without a watermark CVSS 3.1MEDIUM 5.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences