CVE-2026-53947: TryGhost Ghost · Observable Response Discrepancy
Affects TryGhost GhostSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium : upgrade to 6.21.1 when convenient.
Data as of 6 Nov 2026, 23:24 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.21.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade TryGhost Ghost to 6.21.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| TryGhostGhost | Affected
| Fixed in
|
AI-suggested
The vulnerability is fixed in Ghost version 6.21.1. Users should upgrade to version 6.21.1 or later to remediate this issue. Patch status is not explicitly confirmed via a vendor advisory, but the description states the fix is included in 6.21.1. Until upgraded, users should be aware of the risk of email enumeration via signin endpoints.
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.