CVE-2023-37467
MEDIUMDiscourse beta and tests-passed < 3.1.0.beta7 - Unauthenticated Cross-Site Scripting via CSP Nonce Reuse
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2023-37467. PoCs published by ibrahmsql.
AI-analyzed exploit summary This Ruby script demonstrates CVE-2023-37467, a CSP nonce reuse vulnerability in Discourse. It tests for nonce discovery, reuse, and XSS bypass techniques by injecting scripts with discovered nonces.
Description
Discourse is an open source discussion platform. Prior to version 3.1.0.beta7 of the `beta` and `tests-passed` branches, a CSP (Content Security Policy) nonce reuse vulnerability was discovered could allow cross-site scripting (XSS) attacks to bypass CSP protection for anonymous (i.e. unauthenticated) users. There are no known XSS vectors at the moment, but should one be discovered, this vulnerability would allow the XSS attack to bypass CSP and execute successfully. This vulnerability isn't applicable to logged-in users. Version 3.1.0.beta7 contains a patch. The stable branch doesn't have this vulnerability. A workaround to prevent the vulnerability is to disable Google Tag Manager, i.e., unset the `gtm container id` setting.
Exploits (1)
This Ruby script demonstrates CVE-2023-37467, a CSP nonce reuse vulnerability in Discourse. It tests for nonce discovery, reuse, and XSS bypass techniques by injecting scripts with discovered nonces.
References (2)
Scores
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N