CVE-2023-37467 - CVE House
Back to Database
Status published Medium CVE-2023-37467

Discourse CSP nonce reuse vulnerability for anonymous users

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2023-37467

Credits & Attribution

No credits recorded in the NVD database.

References

More from discourse

View All →
CVE-2025-69289
Discourse has insecure default configuration that allows non-admin moderators to takeover any non-staff account via email change
Medium 5.1
CVE-2025-69218
Discourse moderators can access admin-only reports exposing private upload URLs
High 7.1
CVE-2025-68934
Discourse Has Denial of Service (DoS) Vulnerability in Drafts Creation Endpoint
Medium 6.5
CVE-2025-68933
Discourse non-admin moderators can exfiltrate private content via post ownership transfer
Medium 6.9
CVE-2025-68666
Discourse users archives leaked to users with moderation privileges
Medium 5.9

Affected Vendor

Affected Software

discourse
Vulnerable Versions:
>= 3.1.0.beta1, < 3.1.0.beta7

Timeline

Official Publish: July 28th, 2023
Last Modified: October 10th, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-323

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.