CVE-2023-1421 json
Reflected XSS in OAuth flow completion endpoints
published 2023-03-15 3 y ago modified 2026-06-17 4 mo ago also BIT-mattermost-2023-1421 , EUVD-2023-23674
- cvss
- 3.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.
Patch / fix
- bitnami mattermost 7.7.0
- Mattermost Mattermost 7.7
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 23 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mattermost | >=5.32.0, <7.7.0 |
7.7.0 |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
mattermost.com
/security-updates/
vendor-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2023-1421
web
Sources
- CVE List CVE-2023-1421
- NVD CVE-2023-1421
- OSV BIT-mattermost-2023-1421
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