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TI-2021-12449 Aliases CVE-2021-32782

Cross-Site Scripting in Nextcloud Circles

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
High
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application is vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Circles application is upgraded to 0.21.3, 0.20.10 or 0.19.14 to resolve this issue. As a workaround users may use a browser that has support for Content-Security-Policy. A notable exemption is Internet Explorer which does not support CSP properly.

Why it matters now

EPSS 0.00835 57th percentileScored 2026-11-07
Fix Fixed security-advisories (nextcloud): 0.19.1, 0.20.10, 0.21.3

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisoriesbefore 0.19.1; 0.20.0 to before 0.20.10; 0.21.0 to before 0.21.30.19.1, 0.20.10, 0.21.3Patch availableCNA
  • security-advisories Vendornextcloud Affected before 0.19.1; 0.20.0 to before 0.20.10; 0.21.0 to before 0.21.3 Fixed in 0.19.1, 0.20.10, 0.21.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:circles:*:*:*:*:*:*:*:*before 0.19.14; 0.20.0 to before 0.20.10; 0.21.0 to before 0.21.3Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:circles:*:*:*:*:*:*:*:* Versions before 0.19.14; 0.20.0 to before 0.20.10; 0.21.0 to before 0.21.3 Vulnerable ·nextcloud

Remediation

  • Fix · CNA security-advisories (nextcloud) Fixed in 0.19.1, 0.20.10, 0.21.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-32782

References

Patch 2

Advisory 1

  • TI-2021-15505 Secret Circle can be joined without approval in Nextcloud Circles CVSS 3.1MEDIUM 6.5
  • TI-2019-11709 Improper authorization in Nextcloud Circles CVSS 3.1MEDIUM 4.3

Sources

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