CVE-2023-42451 json
Mastodon Invalid Domain Name Normalization vulnerability
published 2023-09-19 3 y ago modified 2026-09-08 2 mo ago also BIT-mastodon-2023-42451 , EUVD-2023-46897 , GHSA-v3xf-c9qf-j667
- cvss
- 7.4
- 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 52%
- public exploits
- 0
- none known
Summary
Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2, under certain circumstances, attackers can exploit a flaw in domain name normalization to spoof domains they do not own. Versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2 contain a patch for this issue.
Patch / fix
- bitnami mastodon 3.5.14, 4.0.10, 4.1.8
- joinmastodon mastodon 3.5.14, 4.0.10, 4.1.8
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 |
| 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 | mastodon | <3.5.14 >=4.0.0, <4.0.10 >=4.1.0, <4.1.8 |
3.5.14 4.0.10 4.1.8 |
Affected products
- mastodon mastodon
Classification
- Weakness
-
- CWE-706 Use of Incorrectly-Resolved Name or Reference
References
Sources
- CVE List CVE-2023-42451
- NVD CVE-2023-42451
- OSV BIT-mastodon-2023-42451
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