CVE-2021-37693 json
Re-use of email tokens in Discourse
published 2021-08-13 5 y ago modified 2026-09-08 2 mo ago also BIT-discourse-2021-37693 , EUVD-2021-24190 , GHSA-9377-96f4-cww4
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
Discourse is an open-source platform for community discussion. In Discourse before versions 2.7.8 and 2.8.0.beta4, when adding additional email addresses to an existing account on a Discourse site an email token is generated as part of the email verification process. Deleting the additional email address does not invalidate an unused token which can then be used in other contexts, including reseting a password.
Patch / fix
Exploit prediction
0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | <2.7.8 |
2.7.8 |
Affected products
- discourse discourse
Classification
References
-
github.com
/discourse/discourse/commit/fb14e50741a4880cda22244eded8858e2f5336ef
patch, third-party-advisory, advisory
-
github.com
/discourse/discourse/security/advisories/GHSA-9377-96f4-cww4
third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-37693
web
Sources
- CVE List CVE-2021-37693
- NVD CVE-2021-37693
- OSV BIT-discourse-2021-37693
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