CVE-2021-36027: Magento/project community edition Cross-Site Scripting Vulnerability
MODERATECVE-2021-36027 is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Magento/project community edition libraries in the Packagist ecosystem. The issue involves magento stored cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 2.3.7-p1, 2.4.2-p2.
CVE-2021-36027 at a Glance
How to Fix CVE-2021-36027
To remediate this vulnerability, upgrade all affected Magento/project community edition dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade magento/project-community-edition to Latest secure releaseUpgrade magento/community-edition to 2.3.7-p1Upgrade magento/community-edition to Latest secure releaseUpgrade magento/community-edition to 2.4.2-p2Upgrade magento/community-edition to Latest secure releaseRun the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for magento/project-community-editionHow to Check if You Are Affected
To determine whether your application is affected by CVE-2021-36027, inspect your project dependencies for Magento/project community edition:
inspect dependencies for magento/project-community-editionAnalyze the terminal output to locate any version of Magento/project community edition in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.7-p1), 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 Magento/project community edition, 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
CVE-2021-36027 Affected Magento/project community edition Versions
5 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
magento/project-community-edition
|
Packagist |
≤ 2.0.2
|
|
|
magento/community-edition
|
Packagist |
< 2.3.7-p1
|
2.3.7-p1
|
|
magento/community-edition
|
Packagist |
2.3.7
All 1 versions
2.3.7
|
None specified
|
|
magento/community-edition
|
Packagist |
≥ 2.4.2-p1
< 2.4.2-p2
|
2.4.2-p2
|
|
magento/community-edition
|
Packagist |
2.4.2
All 1 versions
2.4.2
|
None specified
|
References
Frequently Asked Questions
What is CVE-2021-36027?
Which Magento/project community edition versions are affected?
What version fixes CVE-2021-36027?
Is magento/project-community-edition affected?
Is magento/community-edition affected?
What CWE is associated with CVE-2021-36027?
How can I check Packagist dependencies for CVE-2021-36027?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-x2v2-2jhp-c5hv",
"modified" : "2025-11-06T20:57:45Z",
"published" : "2022-05-24T22:29:05Z",
"aliases" : [ "CVE-2021-36027" ],
"summary" : "Magento stored cross-site scripting vulnerability",
"details" : "Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by a stored cross-site scripting vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.",
"severity" : [ ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "magento/project-community-edition"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"last_affected" : "2.0.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "magento/community-edition"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.3.7-p1"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "magento/community-edition"
},
"versions" : [ "2.3.7" ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "magento/community-edition"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.4.2-p1"
}, {
"fixed" : "2.4.2-p2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "magento/community-edition"
},
"versions" : [ "2.4.2" ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-36027"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/magento/magento2"
}, {
"type" : "WEB",
"url" : "https://helpx.adobe.com/security/products/magento/apsb21-64.html"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-79" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-11-06T20:57:45Z",
"nvd_published_at" : "2021-09-01T15:15:00Z"
}
}