CVE-2021-3138 Security feature bypass in n/a
Attackers can bypass rate limits to circumvent two-factor authentication requirements on specific forms in Discourse.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3138?
CVE-2021-3138 is a high-severity vulnerability in Discourse Discourse, published on 14 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
Weakness: CWE-307
Which versions are affected by CVE-2021-3138?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions to 2.6.0 | None |
Products include Discourse Discourse.
How do I fix CVE-2021-3138?
No fix has been published for CVE-2021-3138 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-3138 being exploited?
There is no known exploitation of CVE-2021-3138 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Discourse Discourse
- CVE-2021-41163 RCE via malicious SNS subscription payload
- CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file
- CVE-2022-39356 Discourse user account takeover via email and invite link
- CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes
- CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint
Sources
Also known as BIT-discourse-2021-3138, GHSA-w9c3-h2rq-jrff.