CVE-2021-3138
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement...
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
- Record
CVE-2021-3138- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-307
- Updated
- 2026-11-02
CVE List No score
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
- Record
CVE-2021-3138- Updated
- 2026-11-02
EUVDEUVD-2021-26485 No score
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
- Record
EUVD-2021-26485- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w9c3-h2rq-jrff No score
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement...
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
- Record
GHSA-w9c3-h2rq-jrff- Weakness
- CWE-307
- Updated
- 2026-11-02
OSV
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
- Record
CVE-2021-3138- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVBIT-discourse-2021-3138 No score
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
- Record
BIT-discourse-2021-3138- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
discourseBitnami |
through 2.6.0 | None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | Mesh3l911/CVE-2021-3138 | 2021-01-12 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3138 is a high vulnerability (CVSS 7.5) in Discourse, published January 14, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.11%, the 87th percentile. No source names a fixed version.