Overview
- 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.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 6.5
- Impact score
- 3.6
- Exploitability score
- 2.8
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 4
- Impact score
- 2.9
- Exploitability score
- 8
- Vector string
- AV:N/AC:L/Au:S/C:P/I:N/A:N
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8CF59A46-813A-4F63-A748-B4B1787475A6",
"versionEndExcluding": "20.0.13",
"versionStartIncluding": "20.0.3"
},
{
"criteria": "cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B8DBD42A-4D0B-4E74-9658-29325664880A",
"versionEndExcluding": "21.0.5",
"versionStartIncluding": "21.0.1"
},
{
"criteria": "cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FABD6E21-6B12-460A-AA56-85C83D641E4E",
"versionEndExcluding": "22.2.0",
"versionStartIncluding": "22.1.1"
}
],
"operator": "OR"
}
]
}
]