CVE-2026-103278

HIGH 7.3

Ghost 5.8.0 before 6.34.0 Staff Account Takeover via Admin iframe

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

Ghost versions 5.8.0 before 6.34.0 contain an input validation vulnerability in the admin iframe that allows attackers to take over staff user accounts. Attackers with content publishing privileges can craft malicious pages that, when visited by active staff users, enable account takeover through improper input validation.

CWE	CWE-23
Vendor	tryghost
Product	ghost
Published	Oct 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

TryGhost / Ghost

5.8.0 < 6.34.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/TryGhost/Ghost/security/advisories/GHSA-5pxf-whwv-g54g vulncheck.com: https://www.vulncheck.com/advisories/ghost-5.8.0-before-6.34.0-staff-account-takeover-via-admin-iframe