CVSS 3.1
6.1 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NCVE-2023-43658
Medium (6.1) in discourse discourse calendar. EPSS 0.6% chance of exploitation in the next 30 days.
dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the 'email preview' UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-31)
- CWE
- CWE-79
- Published
- Modified
- Record from
- the NVD, synced
Affected
- discourse:discourse_calendar
References
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
- https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de
- https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
- https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de