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CVE-2023-49079

Misskey's missing signature validation allows arbitrary users to impersonate any remote user.

HIGH
7.5
CVSS Score
Published: November 29, 2023 at 06:56 PM UTC
Updated: June 17, 2026 at 06:35 AM UTC
2 products affected across 2 vendorsMisskeyMisskey

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%

Description

Misskey is an open source, decentralized social media platform. Misskey's missing signature validation allows arbitrary users to impersonate any remote user. This issue has been patched in version 2023.11.1-beta.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Misskey· Misskey
95%
v < 2023.11.1
Affected range stops below 2023.11.1, so it looks safe — our inference, not a vendor statement
Misskey· Misskey Dev
60%
v < 2023.11.1-beta.1
Affected range stops below 2023.11.1-beta.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMMitigationVendor Advisory
Source: [email protected]
https://github.com/misskey-dev/misskey/security/advisories/GHSA-3f39-6537-3cgc

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

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