Vulnerability in Discourse

CVE-2021-3138

In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.

EPSS: 0.031 (86.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

  • Discourse — versions 2.7.0
  • N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
  • cve@mitre.org (Third Party Advisory, x_refsource_MISC)
  • cve@mitre.org (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-3138?
CVE-2021-3138 is a high-severity vulnerability in Discourse, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.5/10. Published 2021-01-14.
How severe is CVE-2021-3138?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-3138 known to be exploited?
13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.