CVE-2015-5956: Typo3/cms Cross-Site Scripting Vulnerability

LOW
Advisory Identifier: GHSA-989h-wv8x-933p
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CWE-79
Published
Advisory Summary

CVE-2015-5956 is a LOW 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 cross-site scripting (xss). Remediation is available by upgrading affected packages to version 6.2.15, 7.4.0.

CVE-2015-5956 at a Glance

CVE Identifier CVE-2015-5956
GHSA Identifier GHSA-989h-wv8x-933p
Severity LOW
CVSS v3.1 Base Score N/A
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

How to Fix CVE-2015-5956

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: 6.2.15 
Upgrade typo3/cms to 6.2.15
typo3/cms fixed: 7.4.0 
Upgrade typo3/cms to 7.4.0
typo3/cms fixed: Latest secure release 
Upgrade typo3/cms to Latest secure release
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-2015-5956, 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 6.2.15), 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

The sanitizeLocalUrl function in TYPO3 6.x before 6.2.15, 7.x before 7.4.0, 4.5.40, and earlier allows remote authenticated users to bypass the XSS filter and conduct cross-site scripting (XSS) attacks via a base64 encoded data URI, as demonstrated by the (1) returnUrl parameter to show_rechis.php and the (2) redirect_url parameter to index.php.

CVE-2015-5956 Affected Typo3/cms Versions

3 component(s)
Fixed Versions:
6.2.157.4.0
Product / Package Ecosystem Affected Versions Fixed Version
typo3/cms
 Packagist
≥ 6.0
< 6.2.15
6.2.15
typo3/cms
 Packagist
≥ 7.0
< 7.4.0
7.4.0
typo3/cms
 Packagist
≥ 4.0
≤ 4.5.40

References

NVD — CVE-2015-5956 NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-5956
Typo3/cms Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2015-5956.yaml
Typo3/cms Security Information SECURITY
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2015-009
Typo3/cms Security Information SECURITY
http://packetstormsecurity.com/files/133551/Typo3-CMS-6.2.14-4.5.40-Cross-Site-Scripting.html
seclists.org/fulldisclosure/2015... WEB
http://seclists.org/fulldisclosure/2015/Sep/57
Typo3/cms Security Information SECURITY
http://www.securityfocus.com/archive/1/536464/100/0/threaded
Typo3/cms Security Information SECURITY
http://www.securitytracker.com/id/1033551

Frequently Asked Questions

What is CVE-2015-5956?
CVE-2015-5956 is a security vulnerability in Typo3/cms involving TYPO3 cross-site scripting (XSS) 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 6.2.15, 7.4.0 across affected packages: typo3/cms.
What version fixes CVE-2015-5956?
Upgrading to 6.2.15, 7.4.0 (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 6.2.15, 7.4.0, Latest secure release. Upgrade your dependency to 6.2.15, 7.4.0, Latest secure release or later.
What CWE is associated with CVE-2015-5956?
CVE-2015-5956 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-2015-5956?
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-989h-wv8x-933p",
  "modified" : "2024-04-25T21:35:17Z",
  "published" : "2022-05-14T02:48:01Z",
  "aliases" : [ "CVE-2015-5956" ],
  "summary" : "TYPO3 cross-site scripting (XSS)",
  "details" : "The sanitizeLocalUrl function in TYPO3 6.x before 6.2.15, 7.x before 7.4.0, 4.5.40, and earlier allows remote authenticated users to bypass the XSS filter and conduct cross-site scripting (XSS) attacks via a base64 encoded data URI, as demonstrated by the (1) returnUrl parameter to show_rechis.php and the (2) redirect_url parameter to index.php.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0"
      }, {
        "fixed" : "6.2.15"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0"
      }, {
        "fixed" : "7.4.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0"
      }, {
        "last_affected" : "4.5.40"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2015-5956"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2015-5956.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2015-009"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/133551/Typo3-CMS-6.2.14-4.5.40-Cross-Site-Scripting.html"
  }, {
    "type" : "WEB",
    "url" : "http://seclists.org/fulldisclosure/2015/Sep/57"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/archive/1/536464/100/0/threaded"
  }, {
    "type" : "WEB",
    "url" : "http://www.securitytracker.com/id/1033551"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-25T21:35:16Z",
    "nvd_published_at" : "2015-09-16T14:59:00Z"
  }
}