CVE-2021-43676: Matyhtf/framework Path Manipulation Vulnerability

CRITICAL
Advisory Identifier: GHSA-mh9j-v6mq-pfch
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CVSS 9.8
CWE-22
Published
Advisory Summary

CVE-2021-43676 is a CRITICAL (CVSS 9.8) path manipulation vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Matyhtf/framework libraries in the Packagist ecosystem. The issue involves path manipulation in matyhtf/framework. Remediation is available by upgrading affected packages to version 3.0.6.

CVE-2021-43676 at a Glance

CVE Identifier CVE-2021-43676
GHSA Identifier GHSA-mh9j-v6mq-pfch
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Matyhtf/framework
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/A:H).

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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-43676

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

matyhtf/framework fixed: 3.0.6 
Upgrade matyhtf/framework to 3.0.6
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 matyhtf/framework

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-43676, inspect your project dependencies for Matyhtf/framework:

inspect dependencies for matyhtf/framework

Analyze the terminal output to locate any version of Matyhtf/framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.0.6), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Matyhtf/framework, 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

matyhtf framework v3.0.5 is affected by a path manipulation vulnerability in Smarty.class.php. The issue was fixed in version 3.0.6.

CVE-2021-43676 Affected Matyhtf/framework Versions

1 component(s)
Fixed Versions:
3.0.6
Product / Package Ecosystem Affected Versions Fixed Version
matyhtf/framework
 Packagist
< 3.0.6
3.0.6

References

NVD — CVE-2021-43676 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43676
Matyhtf/framework Source Repository REPOSITORY
https://github.com/matyhtf/framework/issues/206
Security Fix Commit FIX COMMIT
https://github.com/matyhtf/framework/commit/25084603b7ea771eebe263d39744fe6abf1f8d61
Matyhtf/framework Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/matyhtf/framework/CVE-2021-43676.yaml
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-mh9j-v6mq-pfch
Matyhtf/framework Source Repository REPOSITORY
https://github.com/matyhtf/framework

Frequently Asked Questions

What is CVE-2021-43676?
CVE-2021-43676 is a security vulnerability in Matyhtf/framework involving Path manipulation in matyhtf/framework under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Matyhtf/framework versions are affected?
Affected versions include releases prior to 3.0.6 across affected packages: matyhtf/framework.
What version fixes CVE-2021-43676?
Upgrading to 3.0.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is matyhtf/framework affected?
Yes, matyhtf/framework is affected in releases prior to 3.0.6. Upgrade your dependency to 3.0.6 or later.
What is the CVSS score of CVE-2021-43676?
CVE-2021-43676 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-43676?
CVE-2021-43676 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Packagist dependencies for CVE-2021-43676?
Run the dependency tree command: 'inspect dependencies for matyhtf/framework'. 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-mh9j-v6mq-pfch",
  "modified" : "2026-07-20T21:29:20Z",
  "published" : "2021-12-04T00:00:53Z",
  "aliases" : [ "CVE-2021-43676" ],
  "summary" : "Path manipulation in matyhtf/framework",
  "details" : "matyhtf framework v3.0.5 is affected by a path manipulation vulnerability in Smarty.class.php. The issue was fixed in version 3.0.6.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "matyhtf/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.0.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-43676"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/matyhtf/framework/issues/206"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/matyhtf/framework/commit/25084603b7ea771eebe263d39744fe6abf1f8d61"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/matyhtf/framework/CVE-2021-43676.yaml"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-mh9j-v6mq-pfch"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/matyhtf/framework"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-02T21:51:34Z",
    "nvd_published_at" : "2021-12-03T14:15:00Z"
  }
}