CVE-2009-0256: Authentication library in TYPO3 vulnerable to session fixation

high Affects typo3/cms. Feed 2026.10.29.1, updated 2026-10-28; published 2022-05-02; advisory modified 2024-01-23.

Authentication library in TYPO3 vulnerable to session fixation

Package: typo3/cms Composer
Affected versions: >=4.0.0 and <4.0.10 or >=4.1.0 and <4.1.8 or >=4.2.0 and <4.2.4
Fixed in: 4.0.10, 4.1.8, 4.2.4
Severity: high
Exploitation: not on CISA KEV · EPSS 2% (78.3th percentile)
Published: 2022-05-02
Source: osv.dev

References

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.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

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

Install docs How findings are ranked

Related advisories

CVE-2016-5385 high HTTP Proxy header vulnerability same package: typo3/cms
CVE-2009-0815 medium TYPO3 leaks a hash secret in an error message same package: typo3/cms
CVE-2010-3714 high TYPO3 Remote File Disclosure vulnerability in the jumpUrl mechanism same package: typo3/cms
CVE-2020-8091 medium Typo3 Cross-Site Scripting in Flash component (ELTS) same package: typo3/cms
CVE-2018-14041 medium Bootstrap Cross-site Scripting vulnerability same package: typo3/cms
CVE-2019-11832 high TYPO3 Image Processing susceptible to Code Execution same package: typo3/cms