CVE-2023-43657

CVSS 3.1 Score 6.1 of 10 (medium)

Details

Published Sep 28, 2023
Updated: Oct 2, 2023
CWE ID 79

Summary

CVE-2023-43657 is a vulnerability affecting Discourse, an open-source discussion platform. The issue lies with the discourse-encrypt plugin, which is intended to ensure secure communication channels. The vulnerability stems from improper escaping of encrypted topic titles, making it possible for attackers to inject malicious scripts via a cross-site scripting (XSS) attack. This issue is exacerbated when the Content Security Policy (CSP) headers are disabled on a site. Although disabling CSP is a non-default configuration, the presence of discourse-encrypt and a disabled CSP increases the risk of a warning in the Discourse admin dashboard. The vulnerability has been addressed in commit `9c75810af9`, which is now part of the latest version of the discourse-encrypt plugin. It is strongly recommended that users upgrade to the latest version or properly configure CSP headers to mitigate this risk.

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