Privilege escalation in Discourse

CVE-2026-30888

Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 allow a moderator to edit site policy documents (ToS, guidelines, privacy policy) that they are explicitly prohibited from modifying. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Vulnerability class: Privilege Escalation

Published · last modified .

CVSS v3 metric

CVSS v3 base score 2.2 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-30888: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

  • Discourse — versions < 2026.3.0-latest.1, >= 2026.1.0-latest, < 2026.1.2, >= 2026.2.0-latest, < 2026.2.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-30888?
CVE-2026-30888 is a low-severity vulnerability in Discourse, classified under Improper Privilege Management. CVSS score: 2.2/10. Published 2026-03-20.
How severe is CVE-2026-30888?
Low severity. CVSS v3 base score is 2.2 out of 10.