CVE-2011-4903

MEDIUMNVD 6.16.1—

6.1

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.

CVSS v3: 6.1
EG Score: 6.1(medium)
EPSS: 56.3%
KEV: Not listed

Published

November 6, 2019

Last Modified

November 21, 2024

References (4)

secalert@redhathttps://security-tracker.debian.org/tracker/CVE-2011-4903
secalert@redhathttps://typo3.org/security/advisory/typo3-core-sa-2011-001/#XSS
af854a3a-2127-422b-91ae-364da2661108https://security-tracker.debian.org/tracker/CVE-2011-4903
af854a3a-2127-422b-91ae-364da2661108https://typo3.org/security/advisory/typo3-core-sa-2011-001/#XSS

Affected Packages

(1 across 1 ecosystem)

Packagist(1)

Package	Vulnerable range	Fixed in	Dependents
typo3/cms	—	4.5.4	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-79Cross-site Scripting (XSS)

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 12:09 UTCEG score recompute
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:43 UTCepss_batch

Frequently asked(5)

What is CVE-2011-4903?

CVE-2011-4903 is a medium vulnerability published on November 6, 2019. 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.

When was CVE-2011-4903 disclosed?

CVE-2011-4903 was first published in the National Vulnerability Database on November 6, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2011-4903 actively exploited?

CVE-2011-4903 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2011-4903?

CVE-2011-4903 has a CVSS v3 base score of 6.1 (NVD).

How do I remediate CVE-2011-4903?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4903, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2011-4903

📅 Published

🔄 Last Modified

🔗 References (4)

Affected Packages

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2011-4903?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

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