CVE-2023-43658

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.

CVSS v3 8.0 HIGH

8.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.1 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP	Third Party Advisory
https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de	Patch
https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6	Vendor Advisory
https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP	Third Party Advisory
https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de	Patch
https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:discourse:discourse_calendar:*:*:*:*:*:discourse:*:*

History

No history.

Information

Published : 2023-10-16 22:15

Updated : 2024-11-21 08:24

NVD link : CVE-2023-43658

Mitre link : CVE-2023-43658

CVE.ORG link : CVE-2023-43658

JSON object : View

Products Affected

discourse

discourse_calendar

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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