2019-06-25-4: Arbitrary Code Execution and Cross-Site Scripting in Backend API

unknown Affects typo3/cms, typo3/cms-core. Feed 2026.10.29.1, updated 2026-10-28.

Arbitrary Code Execution and Cross-Site Scripting in Backend API

Package
typo3/cms Composer
Affected versions
>=8.0.0 and <8.7.27 or >=9.0.0 and <9.5.8
Fixed in
8.7.27, 9.5.8
Severity
unknown
Exploitation
not on CISA KEV
Source
friendsofphp

References

Arbitrary Code Execution and Cross-Site Scripting in Backend API

Package
typo3/cms-core Composer
Affected versions
>=8.0.0 and <8.7.27 or >=9.0.0 and <9.5.8
Fixed in
8.7.27, 9.5.8
Severity
unknown
Exploitation
not on CISA KEV
Source
friendsofphp

References

NVD recordtypo3/cms advisoriestypo3/cms-core 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.

# 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