CVE-2023-22468

Discourse vulnerable to Cross-site Scripting in local oneboxes

State: Published
Severity: 8.8 High
Published: Jan 26, 2023
Updated: Mar 10, 2025
Reserved: Dec 29, 2022

Description

Discourse is an open source platform for community discussion. Versions prior to 2.8.13 (stable), 3.0.0.beta16 (beta) and 3.0.0beta16 (tests-passed), are vulnerable to cross-site Scripting. A maliciously crafted URL can be included in a post to carry out cross-site scripting attacks on sites with disabled or overly permissive CSP (Content Security Policy). Discourse's default CSP prevents this vulnerability. This vulnerability is patched in versions 2.8.13 (stable), 3.0.0.beta16 (beta) and 3.0.0beta16 (tests-passed). As a workaround, enable and/or restore your site's CSP to the default one provided with Discourse.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/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	stable < 2.8.14Affected beta < 3.0.0.beta16Affected tests-passed < 3.0.0.beta16Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-8mr2-xf8r-wr8m

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