CVE-2026-3620: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-px2q-qrrj-jj65
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CVSS 4.4
CWE-20
Published
Advisory Summary

CVE-2026-3620 is a MODERATE (CVSS 4.4) security vulnerability vulnerability (CWE-20: Improper Input Validation) affecting Software libraries in the Maven ecosystem. The weakness occurs when 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.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-3620 at a Glance

CVE Identifier CVE-2026-3620
GHSA Identifier GHSA-px2q-qrrj-jj65
Severity MODERATE
CVSS v3.1 Base Score 4.4
CWE Classification CWE-20: Improper Input Validation
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.4

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

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

How to Fix CVE-2026-3620

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

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-3620, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software 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: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

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 Software, 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

The Word Replacer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'replacement' parameter in all versions up to, and including, 0.4. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

References

NVD — CVE-2026-3620 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3620
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L191
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L230
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L339
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L343
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L191
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L230
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L339
plugins.trac.wordpress.org/browser/word-replac... WEB
https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L343
www.wordfence.com/threat-intel/vulner... WEB
https://www.wordfence.com/threat-intel/vulnerabilities/id/b827f0e1-b8ee-4015-a608-45505f43b324?source=cve

Frequently Asked Questions

What is CVE-2026-3620?
CVE-2026-3620 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-20: Improper Input Validation.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-3620?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-3620?
CVE-2026-3620 has a CVSS v3.1 base score of 4.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-3620?
CVE-2026-3620 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 Maven dependencies for CVE-2026-3620?
Run the dependency tree command: 'mvn dependency:tree'. 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-px2q-qrrj-jj65",
  "modified" : "2026-06-02T09:36:15Z",
  "published" : "2026-06-02T09:36:15Z",
  "aliases" : [ "CVE-2026-3620" ],
  "details" : "The Word Replacer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'replacement' parameter in all versions up to, and including, 0.4. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-3620"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L191"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L230"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L339"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/tags/0.4/word-replacer.php#L343"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L191"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L230"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L339"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/word-replacer/trunk/word-replacer.php#L343"
  }, {
    "type" : "WEB",
    "url" : "https://www.wordfence.com/threat-intel/vulnerabilities/id/b827f0e1-b8ee-4015-a608-45505f43b324?source=cve"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-02T09:16:16Z"
  }
}