CVE-2021-41095 Information

Description

Discourse is an open source discussion platform. There is a cross-site scripting (XSS) vulnerability in versions 2.7.7 and earlier of the stable branch versions 2.8.0.beta6 and earlier of the beta branch and versions 2.8.0.beta6 and earlier of the tests-passed branch. Rendering of some error messages that contain user input can be susceptible to XSS attacks. This vulnerability only affects sites which have blocked watched words that contain HTML tags modified or disabled Discourse’s default Content Security Policy. This issue is patched in the latest stable beta and tests-passed versions of Discourse. As a workaround avoid modifying or disabling Discourse’s default Content Security Policy and blocking watched words containing HTML tags.

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/discourse/discourse/security/advisories/GHSA-qvqx-2h7w-m479 https://github.com/discourse/discourse/pull/14434/commits/40b776b9d39c41d9273d01eecf8fe03aa39fcb59

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