6.5

CVE-2021-37630: nextcloud circles

CVSS: 6.5v3.1MediumModified
Published 07-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-37630 is a medium (CVSS 6.5) vulnerability in nextcloud circles. EPSS estimates a 1.20% chance of exploitation in the next 30 days, higher than 67.7% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-09-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application allowed any user to join any "Secret Circle" without approval by the Circle owner leaking private information. It is recommended that Nextcloud Circles is upgraded to 0.19.15, 0.20.11 or 0.21.4. There are no workarounds for this issue.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.20%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

0.00 pp

From 1.20% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nextcloud2 products
  • circles< 0.19.5 | ≥ 0.20.0, < 0.20.11 | ≥ 0.21.0, < 0.21.4
  • security-advisories< 0.19.15 | ≥ 0.20.0, < 0.20.11 | ≥ 0.21.0, < 0.21.4

1 vendor · 2 products

References

3 links