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Fencer Vulns
high 7.3

CVE-2026-105643 json

Ghost: Stored XSS via Embed Card Previews

published 2026-10-05 34 d ago modified 2026-10-13 27 d ago also BIT-ghost-2026-105643 , EUVD-2026-92632 , GHSA-69qc-f5m6-889c

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

Ghost is a Node.js content management system. From version 6.34.0 until 6.67.0, embed cards in the Ghost editor could bypass protections against stored cross-site scripting. Any staff user, including Contributors, could store scripts in post content that ran when another staff user opened the post in the editor, potentially compromising that user’s admin session. Self-hosted sites should leave the new  security.embedPreviewUrl  configuration option at its default value. This issue is fixed in version 6.67.0.

Patch / fix

  • npm ghost 6.67.0
  • bitnami ghost 6.67.0
  • ghost ghost 6.67.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
33 d ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/penpot/penpot/security/advisories/GHSA-qvq5-c536-pmx8 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
GitHub 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
OSV 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm ghost
>=6.34.0, <6.67.0
6.67.0
bitnami ghost
>=6.34.0, <6.67.0
6.67.0

Affected products

  • TryGhost Ghost

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
  • CWE-653 Improper Isolation or Compartmentalization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.