CVE-2020-25768: Contao/core bundle Contao Insert Tag Injection Vulnerability

MODERATE
Advisory Identifier: GHSA-f7wm-x4gw-6m23
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CVSS 5.3
CWE-20 CWE-74
Published
Advisory Summary

CVE-2020-25768 is a MODERATE (CVSS 5.3) contao insert tag injection vulnerability (CWE-20: Improper Input Validation) affecting Contao/core bundle libraries in the Packagist ecosystem. The issue involves contao insert tag injection in forms. Remediation is available by upgrading affected packages to version 4.4.52, 4.9.6, 4.10.1.

CVE-2020-25768 at a Glance

CVE Identifier CVE-2020-25768
GHSA Identifier GHSA-f7wm-x4gw-6m23
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-20: Improper Input Validation
Affected Product Contao/core bundle
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-2020-25768

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

contao/core-bundle fixed: 4.4.52 
Upgrade contao/core-bundle to 4.4.52
contao/core-bundle fixed: 4.9.6 
Upgrade contao/core-bundle to 4.9.6
contao/contao fixed: 4.4.52 
Upgrade contao/contao to 4.4.52
contao/contao fixed: 4.9.6 
Upgrade contao/contao to 4.9.6
contao/contao fixed: 4.10.1 
Upgrade contao/contao to 4.10.1
contao/core-bundle fixed: 4.10.1 
Upgrade contao/core-bundle to 4.10.1
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 contao/core-bundle

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-25768, inspect your project dependencies for Contao/core bundle:

inspect dependencies for contao/core-bundle

Analyze the terminal output to locate any version of Contao/core bundle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.4.52), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Contao/core bundle, 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

### Impact It is possible to inject insert tags in front end forms which will be replaced when the page is rendered. ### Patches Update to Contao 4.4.52, 4.9.6 or 4.10.1. ### Workarounds Disable the front end login form and do not use form fields with array keys such as `fieldname[]`. ### References https://contao.org/en/security-advisories/insert-tag-injection-in-forms ### For more information If you have any questions or comments about this advisory, open an issue in [contao/contao](https://github.com/contao/contao/issues/new/choose).

CVE-2020-25768 Affected Contao/core bundle Versions

6 component(s)
Fixed Versions:
4.4.524.9.64.10.1
Product / Package Ecosystem Affected Versions Fixed Version
contao/core-bundle
 Packagist
≥ 4.0.0
< 4.4.52
4.4.52
contao/core-bundle
 Packagist
≥ 4.5.0
< 4.9.6
4.9.6
contao/contao
 Packagist
≥ 4.0.0
< 4.4.52
4.4.52
contao/contao
 Packagist
≥ 4.5.0
< 4.9.6
4.9.6
contao/contao
 Packagist
≥ 4.10.0
< 4.10.1
4.10.1
contao/core-bundle
 Packagist
≥ 4.10.0
< 4.10.1
4.10.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/contao/contao/security/advisories/GHSA-f7wm-x4gw-6m23
NVD — CVE-2020-25768 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25768
community.contao.org/en/forumdisplay.php WEB
https://community.contao.org/en/forumdisplay.php?4-Announcements
Contao/core bundle Security Information SECURITY
https://contao.org/en/security-advisories/insert-tag-injection-in-forms.html
Contao/core bundle Source Repository REPOSITORY
https://github.com/contao/contao
Contao/core bundle Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2020-25768.yaml
Contao/core bundle Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2020-25768.yaml

Frequently Asked Questions

What is CVE-2020-25768?
CVE-2020-25768 is a security vulnerability in Contao/core bundle involving Contao Insert tag injection in forms under CWE-20: Improper Input Validation.
Which Contao/core bundle versions are affected?
Affected versions include releases prior to 4.4.52, 4.9.6, 4.10.1 across affected packages: contao/core-bundle, contao/contao.
What version fixes CVE-2020-25768?
Upgrading to 4.4.52, 4.9.6, 4.10.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is contao/core-bundle affected?
Yes, contao/core-bundle is affected in releases prior to 4.4.52, 4.9.6, 4.10.1. Upgrade your dependency to 4.4.52, 4.9.6, 4.10.1 or later.
Is contao/contao affected?
Yes, contao/contao is affected in releases prior to 4.4.52, 4.9.6, 4.10.1. Upgrade your dependency to 4.4.52, 4.9.6, 4.10.1 or later.
What is the CVSS score of CVE-2020-25768?
CVE-2020-25768 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-2020-25768?
CVE-2020-25768 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Packagist dependencies for CVE-2020-25768?
Run the dependency tree command: 'inspect dependencies for contao/core-bundle'. 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-f7wm-x4gw-6m23",
  "modified" : "2024-04-22T18:42:18Z",
  "published" : "2020-09-24T16:23:54Z",
  "aliases" : [ "CVE-2020-25768" ],
  "summary" : "Contao Insert tag injection in forms",
  "details" : "### Impact\n\nIt is possible to inject insert tags in front end forms which will be replaced when the page is rendered.\n\n### Patches\n\nUpdate to Contao 4.4.52, 4.9.6 or 4.10.1.\n\n### Workarounds\n\nDisable the front end login form and do not use form fields with array keys such as `fieldname[]`.\n\n### References\n\nhttps://contao.org/en/security-advisories/insert-tag-injection-in-forms\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in [contao/contao](https://github.com/contao/contao/issues/new/choose).\n",
  "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" : "contao/core-bundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.4.52"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/core-bundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.5.0"
      }, {
        "fixed" : "4.9.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/contao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.4.52"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/contao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.5.0"
      }, {
        "fixed" : "4.9.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/contao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.10.0"
      }, {
        "fixed" : "4.10.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/core-bundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.10.0"
      }, {
        "fixed" : "4.10.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/contao/contao/security/advisories/GHSA-f7wm-x4gw-6m23"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-25768"
  }, {
    "type" : "WEB",
    "url" : "https://community.contao.org/en/forumdisplay.php?4-Announcements"
  }, {
    "type" : "WEB",
    "url" : "https://contao.org/en/security-advisories/insert-tag-injection-in-forms.html"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2020-25768.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2020-25768.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/contao/contao"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-74" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-09-24T16:23:42Z",
    "nvd_published_at" : "2020-10-07T21:15:00Z"
  }
}