CVE-2021-39175 Information

Description

HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0 an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.

CVSS Vector

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

Reference

https://github.com/hedgedoc/hedgedoc/pull/1369 https://github.com/hedgedoc/hedgedoc/pull/1513 https://github.com/hedgedoc/hedgedoc/pull/1375 https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

6.1