CVE-2023-43658
8.0 · HIGHOverview
CVE-2023-43658 is a high-severity vulnerability affecting discourse discourse_calendar. It was published on October 16, 2023 and has a CVSS 3.1 base score of 8.0 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from discourse. Update discourse_calendar to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| discourse | discourse_calendar | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2023-43658?
CVE-2023-43658 is a high-severity vulnerability affecting discourse discourse_calendar. It was published on October 16, 2023 and has a CVSS 3.1 base score of 8.0 (HIGH).
How severe is CVE-2023-43658?
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2023-43658?
Check the references section for vendor advisories and patches from discourse. Update discourse_calendar to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-43658?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-43658 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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