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CVE-2023-52139

29
FAUCET Score

CVE-2023-52139 is a critical vulnerability affecting Misskey, an open-source decentralized social media platform. It allows third-party applications to bypass permission checks for certain endpoints and Websocket APIs, enabling unauthorized access to non-public content. This can lead to the leakage of sensitive administrative information, such as object storage secret keys and SMTP passwords, or allow general users to create unauthorized invitation codes and expose private user data. With a CVSS score of 9.6 (CRITICAL), the vulnerability has a low attack complexity and requires only low privileges, posing a significant risk of high confidentiality and integrity impact. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered considerable community discussion, indicating awareness among researchers and developers.

Impacted Technologies

VendorProductVersion(s)CPE
< 2023.12.1CPE matchmatch criteria
cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.3
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.55%
Probability of exploitation in next 30 days
EPSS Percentile
42.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0055 is in the 45th percentile among its peer group of 1,128 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 1.0 Bluesky, 0.5 Mastodon, and 1.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / misskey-dev/misskey/commit/c96bc36fedc804dc840ea791a9355d7df0748e64
Patch
github.com / misskey-dev/misskey/security/advisories/GHSA-7pxq-6xx9-xpgm
Third Party Advisory