CVE-2020-21526 Information

Description

An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the background a directory traversal check is performed on the input path parameter but the startsWith function can be used to bypass it.

CVSS Vector

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

Reference

https://github.com/halo-dev/halo/issues/421

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8