CVE-2011-4903: Typo3/cms Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-q22w-r5qq-v3wf
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2011-4903 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Typo3/cms libraries in the Packagist ecosystem. The issue involves typo3 xss in removexss function. Remediation is available by upgrading affected packages to version 4.3.12, 4.4.9, 4.5.4.

CVE-2011-4903 at a Glance

CVE Identifier CVE-2011-4903
GHSA Identifier GHSA-q22w-r5qq-v3wf
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Typo3/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2011-4903

To remediate this vulnerability, upgrade all affected Typo3/cms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

typo3/cms fixed: 4.3.12 
Upgrade typo3/cms to 4.3.12
typo3/cms fixed: 4.4.9 
Upgrade typo3/cms to 4.4.9
typo3/cms fixed: 4.5.4 
Upgrade typo3/cms to 4.5.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for typo3/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2011-4903, inspect your project dependencies for Typo3/cms:

inspect dependencies for typo3/cms

Analyze the terminal output to locate any version of Typo3/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.3.12), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Typo3/cms, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2011-4903 Affected Typo3/cms Versions

3 component(s)
Fixed Versions:
4.3.124.4.94.5.4
Product / Package Ecosystem Affected Versions Fixed Version
typo3/cms
 Packagist
< 4.3.12
4.3.12
typo3/cms
 Packagist
≥ 4.4.0
< 4.4.9
4.4.9
typo3/cms
 Packagist
≥ 4.5.0
< 4.5.4
4.5.4

References

NVD — CVE-2011-4903 NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-4903
Typo3/cms Source Repository REPOSITORY
https://github.com/TYPO3/typo3
Typo3/cms Security Information SECURITY
https://security-tracker.debian.org/tracker/CVE-2011-4903
Typo3/cms Security Information SECURITY
https://typo3.org/security/advisory/typo3-core-sa-2011-001/#XSS

Frequently Asked Questions

What is CVE-2011-4903?
CVE-2011-4903 is a security vulnerability in Typo3/cms involving Typo3 XSS in RemoveXSS function under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Typo3/cms versions are affected?
Affected versions include releases prior to 4.3.12, 4.4.9, 4.5.4 across affected packages: typo3/cms.
What version fixes CVE-2011-4903?
Upgrading to 4.3.12, 4.4.9, 4.5.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is typo3/cms affected?
Yes, typo3/cms is affected in releases prior to 4.3.12, 4.4.9, 4.5.4. Upgrade your dependency to 4.3.12, 4.4.9, 4.5.4 or later.
What is the CVSS score of CVE-2011-4903?
CVE-2011-4903 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2011-4903?
CVE-2011-4903 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2011-4903?
Run the dependency tree command: 'inspect dependencies for typo3/cms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q22w-r5qq-v3wf",
  "modified" : "2024-01-12T20:40:32Z",
  "published" : "2022-04-22T00:24:10Z",
  "aliases" : [ "CVE-2011-4903" ],
  "summary" : "Typo3 XSS in RemoveXSS function",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.3.12"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.4.0"
      }, {
        "fixed" : "4.4.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.5.0"
      }, {
        "fixed" : "4.5.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2011-4903"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3/typo3"
  }, {
    "type" : "WEB",
    "url" : "https://security-tracker.debian.org/tracker/CVE-2011-4903"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2011-001/#XSS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-12T20:40:32Z",
    "nvd_published_at" : "2019-11-06T17:15:00Z"
  }
}