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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.031 (87.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
- Discourse — versions 2.7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/discourse/discourse/releases (Third Party Advisory, Release Notes)
- github.com/Mesh3l911/Disource (Third Party Advisory)
- packetstormsecurity.com/files/162256/Discourse-2.7.0-2FA-Bypass.html (Exploit, VDB Entry, Third Party Advisory)
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.