Vulnerability Monitor

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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.

Published

2023-10-16T22:15:12.143

Last Modified

2024-11-21T08:24:33.717

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.0 (HIGH)

Weaknesses

Type: Secondary
CWE-79

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	discourse	discourse_calendar	≤ 2023-10-16	Yes

References

https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP Third Party Advisory ([email protected])
https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de Patch ([email protected])
https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6 Vendor Advisory ([email protected])
https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)