CVE-2026-53947

MEDIUM

Ghost: Member existence leak via magic link sign-in response

Title source: cna
STIX 2.1

Description

Ghost is a Node.js content management system. From 5.18.0 until 6.21.1, a discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. This vulnerability is fixed in 6.21.1.

References (1)

Core 1
Core References

Scores

CVSS v3 5.3
EPSS 0.0021
EPSS Percentile 10.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-204
Status published
Products (1)
TryGhost/Ghost >= 5.18.0, < 6.21.1
Published Jun 24, 2026
Tracked Since Jun 25, 2026