| Vulnerability Name: | CVE-2021-41178 (CCN-211971) | ||||||||||||||||||||||||||||||||||||||||||||
| Assigned: | 2021-10-25 | ||||||||||||||||||||||||||||||||||||||||||||
| Published: | 2021-10-25 | ||||||||||||||||||||||||||||||||||||||||||||
| Updated: | 2022-10-25 | ||||||||||||||||||||||||||||||||||||||||||||
| Summary: | 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. | ||||||||||||||||||||||||||||||||||||||||||||
| CVSS v3 Severity: | 6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) 5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
7.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
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| CVSS v2 Severity: | 4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N)
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| Vulnerability Type: | CWE-434 CWE-23 | ||||||||||||||||||||||||||||||||||||||||||||
| Vulnerability Consequences: | Obtain Information | ||||||||||||||||||||||||||||||||||||||||||||
| References: | Source: MITRE Type: CNA CVE-2021-41178 Source: XF Type: UNKNOWN nextcloud-cve202141178-dir-traversal(211971) Source: CCN Type: Nextcloud GIT Repository File Traversal affecting SVG files on Nextcloud Server Source: CONFIRM Type: Third Party Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jp9c-vpr3-m5rf Source: MISC Type: Patch, Third Party Advisory https://github.com/nextcloud/server/pull/28726 Source: MISC Type: Permissions Required https://hackerone.com/reports/1302155 Source: GENTOO Type: Third Party Advisory GLSA-202208-17 Source: CCN Type: WhiteSource Vulnerability Database CVE-2021-41178 | ||||||||||||||||||||||||||||||||||||||||||||
| Vulnerable Configuration: | Configuration 1: Configuration CCN 1:  Denotes that component is vulnerable | ||||||||||||||||||||||||||||||||||||||||||||
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