CVE-2023-48302 Nextcloud Server vulnerable to Self XSS when pasting HTML into Text app with Ctrl+Shift+V

2023-11-2121:53:00

CWE-79

GitHub_M

www.cve.org

nextcloud

self xss

html

markup

vulnerability

workaround

CVSS3

3.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

EPSS

0.001

Percentile

21.1%

JSON

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and Nextcloud Enterprise Server, when a user is tricked into copy pasting HTML code without markup (Ctrl+Shift+V) the markup will actually render. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.13, 26.0.8, and 27.1.3 contain a fix for this issue. As a workaround, disable app text.

CNA Affected

[
  {
    "vendor": "nextcloud",
    "product": "security-advisories",
    "versions": [
      {
        "version": ">= 25.0.0, < 25.0.13",
        "status": "affected"
      },
      {
        "version": ">= 26.0.0, < 26.0.8",
        "status": "affected"
      },
      {
        "version": ">= 27.0.0, < 27.1.3",
        "status": "affected"
      }
    ]
  }
]