What is CVE-2023-43659?

CVE-2023-43659 is a high-severity vulnerability in Discourse, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2023-10-16.

How severe is CVE-2023-43659?

High severity. CVSS v3 base score is 8.0 out of 10.

XSS in Discourse

CVE-2023-43659

Discourse is an open source platform for community discussion. Improper escaping of user input allowed for Cross-site Scripting attacks via the digest email preview UI. This issue only affects sites with CSP disabled. This issue has been patched in the 3.1.1 stable release as well as the 3.2.0.beta1 release. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (34.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Discourse — versions stable <= 3.1.1, beta <= 3.2.0.beta1, 3.2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2023-43659?: CVE-2023-43659 is a high-severity vulnerability in Discourse, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2023-10-16.
How severe is CVE-2023-43659?: High severity. CVSS v3 base score is 8.0 out of 10.