CVE-2021-3138
HIGHCVSS 7.5/10EPSS 3.07%
Last modified
CVE-2021-3138 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.. EPSS estimates a 3.07% chance of exploitation in the next 30 days.
Description
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Discourse | Discourse | <= 2.6.0 | — |
| Discourse | Discourse | 2.7.0 | Beta1 |
References
- http://packetstormsecurity.com/files/162256/Discourse-2.7.0-2FA-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/Mesh3l911/DisourceThird Party Advisory
- https://github.com/discourse/discourse/releasesRelease Notes, Third Party Advisory
- http://packetstormsecurity.com/files/162256/Discourse-2.7.0-2FA-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/Mesh3l911/DisourceThird Party Advisory
- https://github.com/discourse/discourse/releasesRelease Notes, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-3138?
CVE-2021-3138 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.07% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3138?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3138?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST