9.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2019-16699

CVE-2019-16699: sr_freecap for Typo3 RCE Vulnerability

The sr_freecap (aka freeCap CAPTCHA) extension 2.4.5 and below and 2.5.2 and below for TYPO3 fails to sanitize user input, which allows execution of arbitrary Extbase actions, resulting in Remote Code Execution.

(GitHub Advisory)

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CVE-2019-16699

CVE-2019-16699:

9.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
sjbr/sr-freecap	composer	>= 2.5.0, < 2.5.3	2.5.3
sjbr/sr-freecap	composer	< 2.4.6	2.4.6

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from improper input validation in Extbase action handling. TYPO3 Extbase controllers use Action() methods mapped to user requests. The advisory specifically mentions arbitrary Extbase action execution, which implies the controller's action dispatcher didn't properly validate allowed actions. The FreecapController's processAction would be the primary handler for CAPTCHA validation requests, making it the most likely candidate for improper input sanitization. Attackers could manipulate 'action' parameters to execute unintended methods or pass unsanitized input to dangerous functions. While exact code isn't available, the pattern matches TYPO3's Extbase vulnerability paradigms and the CWE-20 description.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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