CVE-2021-39222
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
0.001 Low
EPSS
Percentile
31.9%
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.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| nextcloud | nextcloud | * | cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* |
| nextcloud | nextcloud | * | cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* |
| nextcloud | nextcloud | * | cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* |
| nextcloud | nextcloud | * | cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* |
| nextcloud | nextcloud | * | cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* |
CNA Affected
[
{
"product": "security-advisories",
"vendor": "nextcloud",
"versions": [
{
"status": "affected",
"version": "< 10.0.7"
},
{
"status": "affected",
"version": ">= 10.1.0, < 10.1.4"
},
{
"status": "affected",
"version": ">= 11.1.0, < 11.1.2"
},
{
"status": "affected",
"version": "< 11.2.0"
},
{
"status": "affected",
"version": ">= 12.0.0.alpha-1, < 12.0.0"
}
]
}
]Related
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
0.001 Low
EPSS
Percentile
31.9%