CVSS 3.1 Score 6.1 of 10 (medium)


Published Oct 16, 2023
Updated: Oct 20, 2023


CVE-2023-43658 is a vulnerability found in the discourse-calendar plugin for the Discourse messaging platform. It allows for Cross-site Scripting (XSS) attacks within the 'email preview' UI when a site has Content Security Policy (CSP) disabled. This vulnerability affects versions of the discourse-calendar plugin prior to the latest release. To remediate this issue, users are advised to upgrade to the latest version of the plugin. If upgrading is not possible, enabling CSP on the forum can mitigate the risk. The impact of this vulnerability is considered medium with low integrity and confidentiality impacts. No privileges are required for exploitation, and user interaction is required. The attack complexity is low, and availability impact is none.

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