Vulnerability in Discourse

CVE-2025-53102

Discourse is an open-source community discussion platform. Prior to version 3.4.7 on the `stable` branch and version 3.5.0.beta.8 on the `tests-passed` branch, upon issuing a physical security key for 2FA, the server generates a WebAuthn c…

EPSS: 0.005 (36.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Discourse — versions >= 3.5.0.beta1, < 3.5.0.beta.8, 3.5.0, < 3.4.7

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-53102?
CVE-2025-53102 is a critical-severity vulnerability in Discourse, classified under Session Fixation. CVSS score: 9.8/10. Published 2025-07-29.
How severe is CVE-2025-53102?
Critical severity. CVSS v3 base score is 9.8 out of 10.