CVE-2026-103278
Received Received - Intake

Ghost Admin Iframe Input Validation Flaw Enables Account Takeover

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-10-01
Last Modified
2026-10-01
Generated
2026-10-01
AI Q&A
2026-10-01
EPSS Evaluated
N/A
NVD
CVE-2026-103278
EUVD
EUVD-2026-90671

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ghost ghost to 6.34.0 (exc)
ghost ghost 6.34.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-23 The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.

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Executive Summary

Ghost versions 5.8.0 before 6.34.0 have an input validation flaw in the admin iframe that allows attackers to take over staff user accounts. Attackers with content publishing privileges can create malicious pages which, when visited by active staff users, lead to account compromise due to improper input validation.

Detection Guidance

To detect this vulnerability, check your Ghost version. If it is between 5.8.0 and 6.33.0, the system is vulnerable. Use commands like 'ghost version' or check your Docker image tag if self-hosted.

Impact Analysis

If you are a Ghost user with staff privileges, an attacker could trick you into visiting a malicious page, potentially gaining control of your account. This could lead to unauthorized access to sensitive data, content manipulation, or further compromise of the Ghost instance.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating GDPR or HIPAA requirements for data protection and access control. Organizations using vulnerable Ghost versions may face compliance risks if data breaches occur.

Mitigation Strategies

Immediately update Ghost to version 6.34.0 or later. For self-hosted instances, use Docker or Ghost-CLI to upgrade. Remove unnecessary content publishing privileges for users to reduce attack surface.

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