CVE-2020-15513: Mittwald/typo3 forum Incorrect Access Control Vulnerability

MODERATE
Advisory Identifier: GHSA-57gr-jvqr-3hwm
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CVSS 5.3
CWE-863
Published
Advisory Summary

CVE-2020-15513 is a MODERATE (CVSS 5.3) incorrect access control vulnerability (CWE-863: Incorrect Authorization) affecting Mittwald/typo3 forum libraries in the Packagist ecosystem. The issue involves incorrect access control in typo3_forum. Remediation is available by upgrading affected packages to version 1.2.1.

CVE-2020-15513 at a Glance

CVE Identifier CVE-2020-15513
GHSA Identifier GHSA-57gr-jvqr-3hwm
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-863: Incorrect Authorization
Affected Product Mittwald/typo3 forum
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:N/S:U/C:N/I:L/A:N).

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

How to Fix CVE-2020-15513

To remediate this vulnerability, upgrade all affected Mittwald/typo3 forum dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mittwald/typo3_forum fixed: 1.2.1 
Upgrade mittwald/typo3_forum to 1.2.1
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 mittwald/typo3_forum

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-15513, inspect your project dependencies for Mittwald/typo3 forum:

inspect dependencies for mittwald/typo3_forum

Analyze the terminal output to locate any version of Mittwald/typo3 forum in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.1), 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Mittwald/typo3 forum, 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 typo3_forum extension before 1.2.1 for TYPO3 has Incorrect Access Control.

CVE-2020-15513 Affected Mittwald/typo3 forum Versions

1 component(s)
Fixed Versions:
1.2.1
Product / Package Ecosystem Affected Versions Fixed Version
mittwald/typo3_forum
 Packagist
< 1.2.1
1.2.1

References

NVD — CVE-2020-15513 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15513
Mittwald/typo3 forum Security Information SECURITY
https://typo3.org/help/security-advisories
Mittwald/typo3 forum Security Information SECURITY
https://typo3.org/security/advisory/typo3-ext-sa-2020-010

Frequently Asked Questions

What is CVE-2020-15513?
CVE-2020-15513 is a security vulnerability in Mittwald/typo3 forum involving Incorrect access control in typo3_forum under CWE-863: Incorrect Authorization.
Which Mittwald/typo3 forum versions are affected?
Affected versions include releases prior to 1.2.1 across affected packages: mittwald/typo3_forum.
What version fixes CVE-2020-15513?
Upgrading to 1.2.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mittwald/typo3_forum affected?
Yes, mittwald/typo3_forum is affected in releases prior to 1.2.1. Upgrade your dependency to 1.2.1 or later.
What is the CVSS score of CVE-2020-15513?
CVE-2020-15513 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2020-15513?
CVE-2020-15513 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check Packagist dependencies for CVE-2020-15513?
Run the dependency tree command: 'inspect dependencies for mittwald/typo3_forum'. 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-57gr-jvqr-3hwm",
  "modified" : "2021-09-23T17:35:16Z",
  "published" : "2020-07-29T18:07:38Z",
  "aliases" : [ "CVE-2020-15513" ],
  "summary" : "Incorrect access control in typo3_forum",
  "details" : "The typo3_forum extension before 1.2.1 for TYPO3 has Incorrect Access Control.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "mittwald/typo3_forum"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15513"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/help/security-advisories"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-ext-sa-2020-010"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-07-29T17:53:59Z",
    "nvd_published_at" : null
  }
}