Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2023-42450 Details

Description

Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 4.2.0-beta1 and prior to version 4.2.0-rc2, by crafting specific input, attackers can inject arbitrary data into HTTP requests issued by Mastodon. This can be used to perform confused deputy attacks if the server configuration includes `ALLOWED_PRIVATE_ADDRESSES` to allow access to local exploitable services. Version 4.2.0-rc2 has a patch for the issue.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/mastodon/mastodon/commit/94893cf24fc95b32cc7a756262acbe008c20a9d2	CVE	Patch
https://github.com/mastodon/mastodon/security/advisories/GHSA-hcqf-fw2r-52g4	CVE	Vendor Advisory
https://github.com/mastodon/mastodon/commit/94893cf24fc95b32cc7a756262acbe008c20a9d2	[email protected]	Patch
https://github.com/mastodon/mastodon/security/advisories/GHSA-hcqf-fw2r-52g4	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-113	Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')	[email protected]
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
joinmastodon mastodon	4.2.0 beta1 4.2.0 beta2 4.2.0 beta3 4.2.0 rc1
CPE cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta1:::::: cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta2:::::: cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta3:::::: cpe:2.3:a:joinmastodon:mastodon:4.2.0:rc1:::::: Remediation No remediation found in references.

Change History

7 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 16, 2024	Modified Analysis	[email protected]
Sep 25, 2023	CVE Modified	[email protected]
Sep 22, 2023	Initial Analysis	[email protected]