CVE-2011-4903

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-11-06 · updated 2026-06-16
Weakness: CWE-79

Description

Cross-site Scripting (XSS) in TYPO3 before 4.3.12, 4.4.x before 4.4.9, and 4.5.x before 4.5.4 allows remote attackers to inject arbitrary web script or HTML via the RemoveXSS function.

Affected products

typo3: from 4.3.0 before 4.3.12; from 4.4.0 before 4.4.9; from 4.5.0 before 4.5.4 — fixed in 4.3.12, 4.4.9, 4.5.4

How to fix

Upgrade to a fixed version: typo3 4.3.12, 4.4.9, 4.5.4. Check the vendor advisory for mitigations.

References

https://security-tracker.debian.org/tracker/CVE-2011-4903
https://typo3.org/security/advisory/typo3-core-sa-2011-001/#XSS
https://security-tracker.debian.org/tracker/CVE-2011-4903
https://typo3.org/security/advisory/typo3-core-sa-2011-001/#XSS

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