CVE-2022-46148

Discourse allows self-XSS through malicious composer message

State: Published
Severity: 7.1 High
Published: Nov 29, 2022
Updated: Apr 23, 2025
Reserved: Nov 28, 2022

Description

Discourse is an open-source messaging platform. In versions 2.8.10 and prior on the `stable` branch and versions 2.9.0.beta11 and prior on the `beta` and `tests-passed` branches, users composing malicious messages and navigating to drafts page could self-XSS. This vulnerability can lead to a full XSS on sites which have modified or disabled Discourse’s default Content Security Policy. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
discoursediscourse	<= 2.8.10Affected >= 2.9.0.beta1, <= 2.9.0.beta11Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-c5h6-6gg5-84fh

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