CVE-2021-40219: Bolt/core Code Injection Vulnerability

HIGH
Advisory Identifier: GHSA-gprh-7767-cw39
Share
CVSS 8.8
CWE-94
Published
Advisory Summary

CVE-2021-40219 is a HIGH (CVSS 8.8) code injection vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Bolt/core libraries in the Packagist ecosystem. The issue involves code injection in bolt cms. Remediation is available in the latest vendor maintenance releases.

CVE-2021-40219 at a Glance

CVE Identifier CVE-2021-40219
GHSA Identifier GHSA-gprh-7767-cw39
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Bolt/core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2021-40219

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

bolt/core fixed: Latest secure release 
Upgrade bolt/core 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 bolt/core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-40219, inspect your project dependencies for Bolt/core:

inspect dependencies for bolt/core

Analyze the terminal output to locate any version of Bolt/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Bolt/core, 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

Bolt CMS <= 4.2 is vulnerable to Remote Code Execution. Unsafe theme rendering allows an authenticated attacker to edit theme to inject server-side template injection that leads to remote code execution.

CVE-2021-40219 Affected Bolt/core Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
bolt/core
 Packagist
≤ 4.2

References

NVD — CVE-2021-40219 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-40219
Bolt/core Source Repository REPOSITORY
https://github.com/bolt/core
Bolt/core Source Repository REPOSITORY
https://github.com/bolt/core/blob/3b21a73ebf519b76756d3ad2841312d10ef11461/src/Controller/Frontend/TemplateController.php
Bolt/core Source Repository REPOSITORY
https://github.com/iiSiLvEr/CVEs/tree/main/CVE-2021-40219
boltcms.com WEB
http://boltcms.com

Frequently Asked Questions

What is CVE-2021-40219?
CVE-2021-40219 is a security vulnerability in Bolt/core involving Code Injection in Bolt CMS under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Bolt/core versions are affected?
Affected versions include releases prior to current release patches across affected packages: bolt/core.
What version fixes CVE-2021-40219?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is bolt/core affected?
Yes, bolt/core is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2021-40219?
CVE-2021-40219 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-40219?
CVE-2021-40219 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check Packagist dependencies for CVE-2021-40219?
Run the dependency tree command: 'inspect dependencies for bolt/core'. 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-gprh-7767-cw39",
  "modified" : "2022-04-22T20:18:24Z",
  "published" : "2022-04-12T00:00:34Z",
  "aliases" : [ "CVE-2021-40219" ],
  "summary" : "Code Injection in Bolt CMS",
  "details" : "Bolt CMS <= 4.2 is vulnerable to Remote Code Execution. Unsafe theme rendering allows an authenticated attacker to edit theme to inject server-side template injection that leads to remote code execution.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "bolt/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "4.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-40219"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/bolt/core"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bolt/core/blob/3b21a73ebf519b76756d3ad2841312d10ef11461/src/Controller/Frontend/TemplateController.php"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/iiSiLvEr/CVEs/tree/main/CVE-2021-40219"
  }, {
    "type" : "WEB",
    "url" : "http://boltcms.com"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-22T20:18:24Z",
    "nvd_published_at" : "2022-04-11T17:15:00Z"
  }
}