CVE-2011-4903
Typo3 XSS in RemoveXSS function
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2011-4903- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2011-4903- Updated
- 2026-11-02
EUVDEUVD-2022-1806 No score
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.
- Record
EUVD-2022-1806- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q22w-r5qq-v3wf
Typo3 XSS in RemoveXSS function
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.
- Record
GHSA-q22w-r5qq-v3wf- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVGHSA-q22w-r5qq-v3wf
Typo3 XSS in RemoveXSS function
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.
- Record
GHSA-q22w-r5qq-v3wf- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
typo3/cmsPackagist |
before 4.3.12 | 4.3.12 |
typo3/cmsPackagist |
4.4.0 up to 4.4.9 | 4.4.9 |
typo3/cmsPackagist |
4.5.0 up to 4.5.4 | 4.5.4 |
typo3-srcDebian:5.0 From an advisory covering 12 CVEs |
before 4.2.5-1+lenny8, plus listed versions 4.2.5-14.2.5-1+lenny14.2.5-1+lenny24.2.5-1+lenny34.2.5-1+lenny44.2.5-1+lenny54.2.5-1+lenny6 |
4.2.5-1+lenny8 |
typo3-srcDebian:6.0 From an advisory covering 12 CVEs |
before 4.3.9+dfsg1-1+squeeze1, plus listed versions 4.3.9+dfsg1-1 |
4.3.9+dfsg1-1+squeeze1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-4903 is a medium vulnerability (CVSS 6.1) in Typo3, published August 7, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 57th percentile. Fixed in typo3/cms 4.3.12.