CVE-2021-44116: Anchorcms/anchor cms Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-7mq6-cp5m-f4j5
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2021-44116 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Anchorcms/anchor cms libraries in the Packagist ecosystem. The issue involves cross-site scripting in anchor cms. Remediation is available in the latest vendor maintenance releases.

CVE-2021-44116 at a Glance

CVE Identifier CVE-2021-44116
GHSA Identifier GHSA-7mq6-cp5m-f4j5
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Anchorcms/anchor cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

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

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

How to Fix CVE-2021-44116

To remediate this vulnerability, upgrade all affected Anchorcms/anchor 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.

anchorcms/anchor-cms fixed: Latest secure release 
Upgrade anchorcms/anchor-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 anchorcms/anchor-cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-44116, inspect your project dependencies for Anchorcms/anchor cms:

inspect dependencies for anchorcms/anchor-cms

Analyze the terminal output to locate any version of Anchorcms/anchor 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Anchorcms/anchor 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

Cross Site Scripting (XSS) vulnerability exits in Anchor CMS <=0.12.7 in posts.php. Attackers can use the posts column to upload the title and content containing malicious code to achieve the purpose of obtaining the administrator cookie, thereby achieving other malicious operations.

CVE-2021-44116 Affected Anchorcms/anchor cms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
anchorcms/anchor-cms
 Packagist
≤ 0.12.7

References

NVD — CVE-2021-44116 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-44116
Anchorcms/anchor cms Source Repository REPOSITORY
https://github.com/anchorcms/anchor-cms
www.cnblogs.com/unrealnumb/p/155734... WEB
https://www.cnblogs.com/unrealnumb/p/15573449.html

Frequently Asked Questions

What is CVE-2021-44116?
CVE-2021-44116 is a security vulnerability in Anchorcms/anchor cms involving Cross-site Scripting in Anchor CMS under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Anchorcms/anchor cms versions are affected?
Affected versions include releases prior to current release patches across affected packages: anchorcms/anchor-cms.
What version fixes CVE-2021-44116?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is anchorcms/anchor-cms affected?
Yes, anchorcms/anchor-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-2021-44116?
CVE-2021-44116 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2021-44116?
CVE-2021-44116 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2021-44116?
Run the dependency tree command: 'inspect dependencies for anchorcms/anchor-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-7mq6-cp5m-f4j5",
  "modified" : "2022-01-04T20:59:44Z",
  "published" : "2022-01-05T14:54:36Z",
  "aliases" : [ "CVE-2021-44116" ],
  "summary" : "Cross-site Scripting in Anchor CMS",
  "details" : "Cross Site Scripting (XSS) vulnerability exits in Anchor CMS <=0.12.7 in posts.php. Attackers can use the posts column to upload the title and content containing malicious code to achieve the purpose of obtaining the administrator cookie, thereby achieving other malicious operations.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "anchorcms/anchor-cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.12.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-44116"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/anchorcms/anchor-cms"
  }, {
    "type" : "WEB",
    "url" : "https://www.cnblogs.com/unrealnumb/p/15573449.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-04T20:59:44Z",
    "nvd_published_at" : "2021-12-15T22:15:00Z"
  }
}