CVE-2019-1020017 — Discourse before 2

Discourse before 2.3.0 and 2.4.x before 2.4.0.beta3 lacks a confirmation screen when logging in via a user-api OTP.

01What is this vulnerability?

Discourse before 2.3.0 and 2.4.x before 2.4.0.beta3 lacks a confirmation screen when logging in via a user-api OTP.

02Affected products

Vendor	Product	Versions
n	a / Discourse	< 2.3.0, 2.4.0.beta1, 2.4.0.beta2, fixed in 2.4.0.beta3

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-07-29T12:25:59.000Z
• Last modified: 2024-08-05T03:14:15.909Z

09References

• github.com — https://github.com/discourse/discourse/commit/b8340c6c8e50a71ff1bca9654b9126ca5a…
• github.com — https://github.com/discourse/discourse/commit/e6e47f2fb22764c92aaa90445c7bf20319…