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CVE-2023-43657

Date: September 28, 2023

discourse-encrypt is a plugin that provides a secure communication channel through Discourse. Improper escaping of encrypted topic titles could lead to a cross site scripting (XSS) issue when a site has content security policy (CSP) headers disabled. Having CSP disabled is a non-default configuration, and having it disabled with discourse-encrypt installed will result in a warning in the Discourse admin dashboard. This has been fixed in commit `9c75810af9` which is included in the latest version of the discourse-encrypt plugin. Users are advised to upgrade. Users unable to upgrade should ensure that CSP headers are enabled and properly configured.

Language: JS

Severity Score

Related Resources (5)

https://github.com/discourse/discourse-encrypt/security/advisories/GHSA-5fh6-wp7p-xx7v
https://github.com/discourse/discourse-encrypt/commit/9c75810af9a474d7edaec67dea66f852c0ba1f4e
https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
https://nvd.nist.gov/vuln/detail/CVE-2023-43657
https://www.mend.io/vulnerability-database/CVE-2023-43657

Severity Score

Weakness Type (CWE)

Cross-Site Scripting (XSS)

CWE-79

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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