CVE-2021-37862 json
Mattermost 6.0 and earlier fails to sufficiently validate the email address during registration, which allows attackers to trick users into…
published 2021-12-17 4 y ago modified 2026-06-17 4 mo ago also BIT-mattermost-2021-37862 , EUVD-2021-24340
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
Mattermost 6.0 and earlier fails to sufficiently validate the email address during registration, which allows attackers to trick users into signing up using attacker-controlled email addresses via crafted invitation token.
Patch / fix
- bitnami mattermost 6.0.1
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mattermost | <6.0.1 |
6.0.1 |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-754 Improper Check for Unusual or Exceptional Conditions
References
-
mattermost.com
/security-updates/
vendor-advisory, web
-
hackerone.com
/reports/1357013
permissions-required, web
-
nvd.nist.gov
/vuln/detail/CVE-2021-37862
web
Sources
- CVE List CVE-2021-37862
- NVD CVE-2021-37862
- OSV BIT-mattermost-2021-37862
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