CVE-2023-4478 json
Parameter tampering in the registration resulting in blocked accounts to be created
published 2023-08-25 3 y ago modified 2026-06-17 4 mo ago also BIT-mattermost-2023-4478 , EUVD-2023-54333
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.
Patch / fix
- bitnami mattermost 7.8.9, 7.10.5
- Mattermost Mattermost 7.8.9, 7.10.5, 8.0.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
| OSV | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mattermost | <7.8.9 >=7.9.0, <7.10.5 >=8.0.0, <=8.0.0 |
7.8.9 7.10.5 |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
References
-
mattermost.com
/security-updates
vendor-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2023-4478
web
Sources
- CVE List CVE-2023-4478
- NVD CVE-2023-4478
- OSV BIT-mattermost-2023-4478
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