CVE-2021-39222
CVSS V2 Medium 4.3
CVSS V3 Medium 6.1
Description
Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. 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 Talk application is upgraded to patched versions 10.0.7, 10.1.4, 11.1.2, 11.2.0 or 12.0.0. As a workaround, use a browser that has support for Content-Security-Policy.
Overview
- CVE ID
- CVE-2021-39222
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-11-15T19:15:07
- Last Modified Date
- 2021-11-17T18:43:10
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:* | 1 | OR | 10.0.7 | |
| cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:* | 1 | OR | 10.1.0 | 10.1.4 |
| cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:* | 1 | OR | 11.0.0 | 11.1.2 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 6.1
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 2.7
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g | Third Party Advisory |
| https://hackerone.com/reports/1135481 | Permissions Required Third Party Advisory |
| https://github.com/nextcloud/spreed/pull/542 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-39222 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39222 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:46:32 | Added to TrackCVE | |||
| 2022-12-05 14:33:39 | 2021-11-15T19:15Z | 2021-11-15T19:15:07 | CVE Published Date | updated |
| 2022-12-05 14:33:39 | 2021-11-17T18:43:10 | CVE Modified Date | updated | |
| 2022-12-05 14:33:39 | Analyzed | Vulnerability Status | updated |