Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2023-43658

8.0 · HIGH

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.

Published Oct 16, 2023CWE-79EPSS 0.59%

Overview

CVE-2023-43658 is a high-severity vulnerability. 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, patches, and mitigation guidance. 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.

References

Refdeveloper.mozilla.org/en-US/docs/Web/HTTP/CSPGitHubgithub.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644deGitHubgithub.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6Refdeveloper.mozilla.org/en-US/docs/Web/HTTP/CSPGitHubgithub.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644deGitHubgithub.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6

How CyberStrike helps

Frequently asked questions

What is CVE-2023-43658?

CVE-2023-43658 is a high-severity vulnerability. 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, patches, and mitigation guidance. 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 is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-43658 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2023

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999