CVE-2021-41178
CVSS V2 Medium 4
CVSS V3 Medium 6.5
Description
Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, a file traversal vulnerability makes an attacker able to download arbitrary SVG images from the host system, including user provided files. This could also be leveraged into a XSS/phishing attack, an attacker could upload a malicious SVG file that mimics the Nextcloud login form and send a specially crafted link to victims. The XSS risk here is mitigated due to the fact that Nextcloud employs a strict Content-Security-Policy disallowing execution of arbitrary JavaScript. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.
Overview
- CVE ID
- CVE-2021-41178
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-10-25T22:15:07
- Last Modified Date
- 2022-10-25T20:53:24
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:* | 1 | OR | 20.0.3 | 20.0.13 |
| cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:* | 1 | OR | 21.0.1 | 21.0.5 |
| cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:* | 1 | OR | 22.1.1 | 22.2.0 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 4
- Severity
- MEDIUM
- Exploitability Score
- 8
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jp9c-vpr3-m5rf | Third Party Advisory |
| https://github.com/nextcloud/server/pull/28726 | Patch Third Party Advisory |
| https://hackerone.com/reports/1302155 | Permissions Required |
| https://security.gentoo.org/glsa/202208-17 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-41178 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41178 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:26:52 | Added to TrackCVE | |||
| 2022-12-05 13:15:17 | 2021-10-25T22:15Z | 2021-10-25T22:15:07 | CVE Published Date | updated |
| 2022-12-05 13:15:17 | 2022-10-25T20:53:24 | CVE Modified Date | updated | |
| 2022-12-05 13:15:17 | Analyzed | Vulnerability Status | updated | |
| 2022-12-05 13:15:18 | CWE-23 | Weakness Enumeration | updated | |
| 2022-12-05 13:15:22 | References | updated |