CVE-2023-43658

Source
https://nvd.nist.gov/vuln/detail/CVE-2023-43658
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-43658.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-43658
Aliases
  • GHSA-3fwj-f6ww-7hr6
Published
2023-10-16T21:28:57Z
Modified
2025-10-21T19:32:24Z
Severity
  • 8.0 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Improper escaping of user input in discourse-calendar
Details

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.

Database specific
{
    "cwe_ids": [
        "CWE-79"
    ]
}
References

Affected packages

Git / github.com/discourse/discourse-calendar

Affected ranges

Type
GIT
Repo
https://github.com/discourse/discourse-calendar
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed