CVE-2026-53947CWE-204

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

Medium · published June 24, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
26.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00345 · 26.8th percentile
Weakness
CWE-204 · Observable Response Discrepancy
Published
2026-06-24T18:07Z
EPSS history
Timeline
  • 24 JUN 18:07Z
    Ghost: Member existence leak via magic link sign-in response
    cvelistv5