CVE-2025-47941: Typo3/cms backend The TYPO3 CMS Backend Has Vulnerability

HIGH
Advisory Identifier: GHSA-744g-7qm9-hjh9
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CVSS 7.2
CWE-288
Published
Advisory Summary

CVE-2025-47941 is a HIGH (CVSS 7.2) the typo3 cms backend has vulnerability (CWE-288: Authentication Bypass Using an Alternate Path or Channel) affecting Typo3/cms backend libraries in the Packagist ecosystem. The issue involves the typo3 cms backend has broken authentication in backend mfa. Remediation is available by upgrading affected packages to version 12.4.31, 13.4.12.

CVE-2025-47941 at a Glance

CVE Identifier CVE-2025-47941
GHSA Identifier GHSA-744g-7qm9-hjh9
Severity HIGH
CVSS v3.1 Base Score 7.2
CWE Classification CWE-288: Authentication Bypass Using an Alternate Path or Channel
Affected Product Typo3/cms backend
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.2

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

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

How to Fix CVE-2025-47941

To remediate this vulnerability, upgrade all affected Typo3/cms backend 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-backend fixed: 12.4.31 
Upgrade typo3/cms-backend to 12.4.31
typo3/cms-backend fixed: 13.4.12 
Upgrade typo3/cms-backend to 13.4.12
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-backend

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-47941, inspect your project dependencies for Typo3/cms backend:

inspect dependencies for typo3/cms-backend

Analyze the terminal output to locate any version of Typo3/cms backend in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 12.4.31), 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-288: Authentication Bypass Using an Alternate Path or Channel, where the product requires authentication, but the product has an alternate path or channel that does not require authentication. In Typo3/cms backend, 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

### Problem The multifactor authentication (MFA) dialog presented during backend login can be bypassed due to insufficient enforcement of access restrictions on all backend routes. Successful exploitation requires valid backend user credentials, as MFA can only be bypassed after successful authentication. ### Solution Update to TYPO3 versions 12.4.31 LTS, 13.4.12 LTS that fix the problem described. ### Credits Thanks to Jens Jacobsen and Y. Kahveci for reporting this issue, and to TYPO3 security team member Torben Hansen for fixing it.

CVE-2025-47941 Affected Typo3/cms backend Versions

2 component(s)
Fixed Versions:
12.4.3113.4.12
Product / Package Ecosystem Affected Versions Fixed Version
typo3/cms-backend
 Packagist
≥ 12.0.0
< 12.4.31
12.4.31
typo3/cms-backend
 Packagist
≥ 13.0.0
< 13.4.12
13.4.12

References

GitHub Advisory / Wiki ADVISORY
https://github.com/TYPO3/typo3/security/advisories/GHSA-744g-7qm9-hjh9
NVD — CVE-2025-47941 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-47941
Security Fix Commit FIX COMMIT
https://github.com/TYPO3-CMS/backend/commit/034f589029952084771c5f98d42ed0f69f9a7ead
Typo3/cms backend Source Repository REPOSITORY
https://github.com/TYPO3-CMS/backend
Typo3/cms backend Security Information SECURITY
https://typo3.org/security/advisory/typo3-core-sa-2025-015

Frequently Asked Questions

What is CVE-2025-47941?
CVE-2025-47941 is a security vulnerability in Typo3/cms backend involving The TYPO3 CMS Backend has Broken Authentication in Backend MFA under CWE-288: Authentication Bypass Using an Alternate Path or Channel.
Which Typo3/cms backend versions are affected?
Affected versions include releases prior to 12.4.31, 13.4.12 across affected packages: typo3/cms-backend.
What version fixes CVE-2025-47941?
Upgrading to 12.4.31, 13.4.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is typo3/cms-backend affected?
Yes, typo3/cms-backend is affected in releases prior to 12.4.31, 13.4.12. Upgrade your dependency to 12.4.31, 13.4.12 or later.
What is the CVSS score of CVE-2025-47941?
CVE-2025-47941 has a CVSS v3.1 base score of 7.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2025-47941?
CVE-2025-47941 is classified under CWE-288: Authentication Bypass Using an Alternate Path or Channel (The product requires authentication, but the product has an alternate path or channel that does not require authentication.).
How can I check Packagist dependencies for CVE-2025-47941?
Run the dependency tree command: 'inspect dependencies for typo3/cms-backend'. 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-744g-7qm9-hjh9",
  "modified" : "2025-05-20T19:39:37Z",
  "published" : "2025-05-20T19:39:37Z",
  "aliases" : [ "CVE-2025-47941" ],
  "summary" : "The TYPO3 CMS Backend has Broken Authentication in Backend MFA",
  "details" : "### Problem\nThe multifactor authentication (MFA) dialog presented during backend login can be bypassed due to insufficient enforcement of access restrictions on all backend routes.\n\nSuccessful exploitation requires valid backend user credentials, as MFA can only be bypassed after successful authentication.\n\n### Solution\nUpdate to TYPO3 versions 12.4.31 LTS, 13.4.12 LTS that fix the problem described.\n\n### Credits\nThanks to Jens Jacobsen and Y. Kahveci for reporting this issue, and to TYPO3 security team member Torben Hansen for fixing it.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-backend"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "12.0.0"
      }, {
        "fixed" : "12.4.31"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 12.4.30"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-backend"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "13.0.0"
      }, {
        "fixed" : "13.4.12"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 13.4.11"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/typo3/security/advisories/GHSA-744g-7qm9-hjh9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-47941"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3-CMS/backend/commit/034f589029952084771c5f98d42ed0f69f9a7ead"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3-CMS/backend"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2025-015"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-288" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-05-20T19:39:37Z",
    "nvd_published_at" : "2025-05-20T14:15:51Z"
  }
}