CVE-2020-11055 Cross-site Scripting in BookStack

2020-05-0720:40:14

CWE-79

GitHub_M

www.cve.org

6.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

34.4%

JSON

In BookStack greater than or equal to 0.18.0 and less than 0.29.2, there is an XSS vulnerability in comment creation. A user with permission to create comments could POST HTML directly to the system to be saved in a comment, which would then be executed/displayed to others users viewing the comment. Through this vulnerability custom JavaScript code could be injected and therefore ran on other user machines. This most impacts scenarios where not-trusted users are given permission to create comments. This has been fixed in 0.29.2.

CNA Affected

[
  {
    "product": "BookStack",
    "vendor": "BookStackApp",
    "versions": [
      {
        "status": "affected",
        "version": ">= 0.18.0, < 0.29.2"
      }
    ]
  }
]