Is this vulnerability remotely exploitable?

Yes, if an attacker can cause the Ghost instance to install or activate a malicious theme remotely—such as by gaining access to the admin panel, abusing an upload endpoint, or influencing an automated deployment process—they can potentially achieve remote code execution when the theme is rendered.

What level of access does an attacker need to exploit this?

The attacker must be able to introduce a crafted theme into the environment and have it activated or used by Ghost. This often implies administrative or equivalent control over theme management, or control over the supply chain that delivers themes to production.

What is the safest general fix pattern for this kind of issue?

The safest pattern is to treat theme content as untrusted and ensure that it cannot directly introduce executable code. This usually means enforcing a restricted, declarative templating model, applying rigorous escaping to theme-controlled values, and avoiding dynamic evaluation of theme-provided strings in any execution context.

Severity:

HIGH RISK

(7.6)

Server-Side Code Injection via Malicious Themes (CWE-74) in Ghost CMS

CVE-2026-29053

Published:

Mar 5, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

Server-Side Code Injection

CWE:

CWE-74

Impact:

Remote Code Execution via Malicious Theme Packages

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

Vulnerability Type

Category:

Server-Side Code Injection

CWE:

CWE-74

Impact:

Remote Code Execution via Malicious Theme Packages

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Server-Side Code Injection via Malicious Themes (CWE-74) in Ghost CMS

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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