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CVE-2021-37629

20
FAUCET Score

CVE-2021-37629 affects Nextcloud Richdocuments, an open-source collaborative office suite, due to a lack of rate limiting on its OCS endpoint. This vulnerability could allow an attacker to enumerate potentially valid share tokens. Rated as medium severity (CVSS 5.3), it has a low attack complexity and requires no user interaction, potentially leading to a limited disclosure of information. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion regarding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.8.4CPE matchmatch criteria
cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.2.1CPE matchmatch criteria
cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.38%
Probability of exploitation in next 30 days
EPSS Percentile
69.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0138 is in the 51st percentile among its peer group of 23,703 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / nextcloud/richdocuments/pull/1663
Third Party Advisory
github.com / nextcloud/security-advisories/security/advisories/GHSA-gvvr-h36p-8mjx
Third Party Advisory
hackerone.com / reports/1258750
Permissions RequiredThird Party Advisory