What is CVE-2023-36473?

CVE-2023-36473 is a medium-severity vulnerability in Discourse, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2023-07-13.

How severe is CVE-2023-36473?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Is CVE-2023-36473 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Discourse

CVE-2023-36473

Discourse is an open source discussion platform. A CSP (Content Security Policy) nonce reuse vulnerability could allow XSS attacks to bypass CSP protection. There are no known XSS vectors at the moment, but should one be discovered, this vulnerability would allow the XSS attack to completely bypass CSP. The vulnerability is patched in the latest tests-passed, beta and stable branches.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (32.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Discourse — versions 2.4.0, tests-passed >= 3.1.0.beta6, 3.1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2023-36473?: CVE-2023-36473 is a medium-severity vulnerability in Discourse, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2023-07-13.
How severe is CVE-2023-36473?: Medium severity. CVSS v3 base score is 6.8 out of 10.
Is CVE-2023-36473 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.