What is CVE-2023-37906?

CVE-2023-37906 is a medium-severity vulnerability in Discourse, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2023-07-28.

How severe is CVE-2023-37906?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Discourse

CVE-2023-37906

Discourse is an open source discussion platform. Prior to version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches, a malicious user can edit a post in a topic and cause a DoS with a carefully crafted edit reason. The issue is patched in version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches. There are no known workarounds for this vulnerability.

Published 2023-07-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.005 (43.7th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Discourse — versions 2.4.0, 3.1.0, 2.9.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/discourse/discourse/security/advisories/GHSA-pjv6-47x6-mx7c (Vendor Advisory)
github.com/discourse/discourse/commit/dcc825bda505a344eda403a1b8733f30e784034a (Patch)

Frequently asked questions

What is CVE-2023-37906?: CVE-2023-37906 is a medium-severity vulnerability in Discourse, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2023-07-28.
How severe is CVE-2023-37906?: Medium severity. CVSS v3 base score is 4.3 out of 10.