N/A

CVSS Score

-

CVSS Score

Basic Information

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CVE-2010-5100

CVE-2010-5100: TYPO3 Cross-Site Scripting vulnerability in the Install Tool

Multiple cross-site scripting (XSS) vulnerabilities in the Install Tool in TYPO3 4.2.x before 4.2.16, 4.3.x before 4.3.9, and 4.4.x before 4.4.5 allow remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.

(GitHub Advisory)

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CVE-2010-5100

CVE-2010-5100:

N/A

CVSS Score

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
typo3/cms-install	composer	>= 4.2.0, < 4.2.16	4.2.16
typo3/cms-install	composer	>= 4.3.0, < 4.3.9	4.3.9
typo3/cms-install

Technical Details

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Root Cause Analysis

The patches for CVE-2010-5100 (commits 9bb2fe6, cf97494, e892f0a) consistently add htmlspecialchars() to variables like TYPO3_db_username, TYPO3_db_host, and TYPO3_db when outputting them in the Install Tool's HTML. These variables were previously embedded without sanitization in functions like stepOutput() and checkDatabase(), which handle the rendering of user-facing configuration data. Since authenticated attackers could manipulate these values (e.g., via database configuration inputs), the lack of escaping in these functions directly enabled XSS. The high confidence stems from the explicit addition of sanitization in the patches targeting these specific code paths.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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