Vulnerability Report

CVE-2023-43658

Title: Discourse Discourse Calendar Cross-Site Scripting (XSS)

Cross-Site Scripting (XSS)

Proof Of Concept

No public PoC currently indexed for CVE-2023-43658.

CWE Category CWE-79
Published Date Oct 16, 2023
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 8.0 CVSS v3.1
Exploit Probability (EPSS)
0.57%

Vulnerability Summary

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.

Impacted Vendors

D
discourse 1

Reference Links

https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6 https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.0
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-43658 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.