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CVE-2009-3636: Typo3 API Install Tool vulnerable to Cross-site Scripting

medium Affects typo3/cms-install. Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

Typo3 API Install Tool vulnerable to Cross-site Scripting

Package
typo3/cms-install Composer
Affected versions
<=4.0.13 or >=4.1.0 and <4.1.13 or >=4.2.0 and <4.2.10 or >=4.3alpha1 and <4.3beta2
Fixed in
4.1.13, 4.2.10, 4.3beta2
Severity
medium
Exploitation
not on CISA KEV · EPSS 2% (80.3th percentile)
Published
2022-05-02
Source
osv.dev

References

CWE-79
NVD recordtypo3/cms-install advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

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