GHSA-4542-p56h-8xww: Cross-Site Scripting (XSS) vulnerabilities in Neos

high Affects typo3/neos. Feed 2026.10.29.4, updated 2026-10-29; published 2024-06-05; advisory modified 2024-12-02.

Cross-Site Scripting (XSS) vulnerabilities in Neos

Package: typo3/neos Composer
Affected versions: >=1.2.0 and <1.2.13 or >=2.0.0 and <2.0.4
Fixed in: 1.2.13, 2.0.4
Severity: high
Exploitation: not on CISA KEV
Published: 2024-06-05
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.

# 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

Install docs How findings are ranked

Related advisories

GHSA-wr3c-6c22-m9v6 medium Privilege Escalation in TYPO3 Neos same package: typo3/neos
2015-03-28 unknown Privilege Escalation in TYPO3 Neos same package: typo3/neos
2015-11-23 unknown Arbitrary file upload and XML External Entity processing same package: typo3/neos
2019-06-17 unknown Information Disclosure Security Note same package: typo3/neos
GHSA-g4xv-r3qw-v3q2 high typo3 Information Disclosure Security Note same package: typo3/neos