CVE-2018-20465: Craftcms/cms Craft CMS Vulnerable To Server-Side Vulnerability

HIGH
Advisory Identifier: GHSA-j7fx-v37j-v3w7
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CVSS 7.2
CWE-311 CWE-1336
Published
Advisory Summary

CVE-2018-20465 is a HIGH (CVSS 7.2) craft cms vulnerable to server-side vulnerability (CWE-311: Missing Encryption of Sensitive Data) affecting Craftcms/cms libraries in the Packagist ecosystem. The issue involves craft cms vulnerable to server-side template injection. Remediation is available in the latest vendor maintenance releases.

CVE-2018-20465 at a Glance

CVE Identifier CVE-2018-20465
GHSA Identifier GHSA-j7fx-v37j-v3w7
Severity HIGH
CVSS v3.1 Base Score 7.2
CWE Classification CWE-311: Missing Encryption of Sensitive Data
Affected Product Craftcms/cms
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:3.0/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-2018-20465

To remediate this vulnerability, upgrade all affected Craftcms/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.

craftcms/cms fixed: Latest secure release 
Upgrade craftcms/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 craftcms/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-20465, inspect your project dependencies for Craftcms/cms:

inspect dependencies for craftcms/cms

Analyze the terminal output to locate any version of Craftcms/cms 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-311: Missing Encryption of Sensitive Data, where the product does not encrypt sensitive or critical information before storage or transmission. In Craftcms/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

Craft CMS through 3.0.34 allows remote authenticated administrators to read sensitive information via server-side template injection, as demonstrated by a `{%` string for `craft.app.config.DB.user` and `craft.app.config.DB.password` in the URI Format of the Site Settings, which causes a cleartext username and password to be displayed in a URI field.

CVE-2018-20465 Affected Craftcms/cms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/cms
 Packagist
≤ 3.0.34

References

NVD — CVE-2018-20465 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20465
Craftcms/cms Source Repository REPOSITORY
https://github.com/phuctam/Server-Side-Template-Injection-in-CraftCMS-/issues/1
Craftcms/cms Source Repository REPOSITORY
https://github.com/craftcms/cms
Craftcms/cms Source Repository REPOSITORY
https://github.com/craftcms/cms/blob/master/CHANGELOG-v3.md

Frequently Asked Questions

What is CVE-2018-20465?
CVE-2018-20465 is a security vulnerability in Craftcms/cms involving Craft CMS Vulnerable to Server-Side Template Injection under CWE-311: Missing Encryption of Sensitive Data.
Which Craftcms/cms versions are affected?
Affected versions include releases prior to current release patches across affected packages: craftcms/cms.
What version fixes CVE-2018-20465?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is craftcms/cms affected?
Yes, craftcms/cms 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-2018-20465?
CVE-2018-20465 has a CVSS v3.1 base score of 7.2 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2018-20465?
CVE-2018-20465 is classified under CWE-311: Missing Encryption of Sensitive Data (The product does not encrypt sensitive or critical information before storage or transmission.).
How can I check Packagist dependencies for CVE-2018-20465?
Run the dependency tree command: 'inspect dependencies for craftcms/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-j7fx-v37j-v3w7",
  "modified" : "2024-04-25T22:32:04Z",
  "published" : "2022-05-13T01:51:05Z",
  "aliases" : [ "CVE-2018-20465" ],
  "summary" : "Craft CMS Vulnerable to Server-Side Template Injection",
  "details" : "Craft CMS through 3.0.34 allows remote authenticated administrators to read sensitive information via server-side template injection, as demonstrated by a `{%` string for `craft.app.config.DB.user` and `craft.app.config.DB.password` in the URI Format of the Site Settings, which causes a cleartext username and password to be displayed in a URI field.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.0.34"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-20465"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/phuctam/Server-Side-Template-Injection-in-CraftCMS-/issues/1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/cms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/blob/master/CHANGELOG-v3.md"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1336", "CWE-311" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-25T22:32:04Z",
    "nvd_published_at" : "2018-12-25T23:29:00Z"
  }
}