XSS in Discourse
CVE-2023-26040
Discourse is an open-source discussion platform. Between versions 3.1.0.beta2 and 3.1.0.beta3 of the `tests-passed` branch, editing or responding to a chat message containing malicious content could lead to a cross-site scripting attack. This issue is patched in version 3.1.0.beta3 of the `tests-passed` branch. There are no known workarounds.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.004 (27.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
Affected products
- Discourse — versions 3.1.0, tests-passed > 3.1.0.beta2, < 3.1.0.beta3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-26040?
- CVE-2023-26040 is a medium-severity vulnerability in Discourse, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2023-03-17.
- How severe is CVE-2023-26040?
- Medium severity. CVSS v3 base score is 6.5 out of 10.