8.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2024-29686

CVE-2024-29686: Winter CMS Server-Side Template Injection (SSTI) vulnerability

Server-side Template Injection (SSTI) vulnerability in Winter CMS v.1.2.3 allows a remote attacker to execute arbitrary code via a crafted payload to the CMS Pages field and Plugin components.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2024-29686

CVE-2024-29686:

8.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
wintercms/winter	composer	<= 1.2.3

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from Winter CMS's handling of user-provided Twig templates in Pages and Plugin components. The exploit demonstrates that unescaped Twig syntax (e.g., {{7*7}}) is directly evaluated during rendering. Key functions in the CMS rendering pipeline (Controller::renderPage for pages, ComponentBase::onRun for plugins) process these templates without sufficient validation or sandboxing. The CWE-97 mapping confirms improper SSI neutralization, and the PHP/Twig template structure documentation shows user-editable sections where payloads could be injected. While the vendor disputes exploitability due to requiring admin privileges, the technical root cause lies in these rendering functions accepting raw Twig input.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

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WAF Protection Rules

WAF Rule

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Reasoning

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