CVE-2025-12761: Drupal/simple multistep Cross-Site Scripting Vulnerability

LOW
Advisory Identifier: GHSA-gg35-374m-9ph8
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CVSS 3.5
CWE-79
Published
Advisory Summary

CVE-2025-12761 is a LOW (CVSS 3.5) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Drupal/simple multistep libraries in the Packagist ecosystem. The issue involves drupal simple multi step form allows cross-site scripting. Remediation is available by upgrading affected packages to version 2.0.0.

CVE-2025-12761 at a Glance

CVE Identifier CVE-2025-12761
GHSA Identifier GHSA-gg35-374m-9ph8
Severity LOW
CVSS v3.1 Base Score 3.5
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Drupal/simple multistep
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 3.5

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

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

How to Fix CVE-2025-12761

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

drupal/simple_multistep fixed: 2.0.0 
Upgrade drupal/simple_multistep to 2.0.0
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 drupal/simple_multistep

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-12761, inspect your project dependencies for Drupal/simple multistep:

inspect dependencies for drupal/simple_multistep

Analyze the terminal output to locate any version of Drupal/simple multistep in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.0), 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 Drupal/simple multistep, 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

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Simple multi step form allows Cross-Site Scripting (XSS).This issue affects Simple multi step form: from 0.0.0 before 2.0.0.

CVE-2025-12761 Affected Drupal/simple multistep Versions

1 component(s)
Fixed Versions:
2.0.0
Product / Package Ecosystem Affected Versions Fixed Version
drupal/simple_multistep
 Packagist
< 2.0.0
2.0.0

References

NVD — CVE-2025-12761 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-12761
git.drupalcode.org/project/simple_mult... PACKAGE
https://git.drupalcode.org/project/simple_multistep
www.drupal.org/sa-contrib-2025-116 WEB
https://www.drupal.org/sa-contrib-2025-116

Frequently Asked Questions

What is CVE-2025-12761?
CVE-2025-12761 is a security vulnerability in Drupal/simple multistep involving Drupal Simple multi step form allows Cross-Site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Drupal/simple multistep versions are affected?
Affected versions include releases prior to 2.0.0 across affected packages: drupal/simple_multistep.
What version fixes CVE-2025-12761?
Upgrading to 2.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is drupal/simple_multistep affected?
Yes, drupal/simple_multistep is affected in releases prior to 2.0.0. Upgrade your dependency to 2.0.0 or later.
What is the CVSS score of CVE-2025-12761?
CVE-2025-12761 has a CVSS v3.1 base score of 3.5 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2025-12761?
CVE-2025-12761 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-2025-12761?
Run the dependency tree command: 'inspect dependencies for drupal/simple_multistep'. 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-gg35-374m-9ph8",
  "modified" : "2025-11-19T14:19:08Z",
  "published" : "2025-11-18T18:32:52Z",
  "aliases" : [ "CVE-2025-12761" ],
  "summary" : "Drupal Simple multi step form allows Cross-Site Scripting",
  "details" : "Improper Neutralization of Input During Web Page Generation (\"Cross-site Scripting\") vulnerability in Drupal Simple multi step form allows Cross-Site Scripting (XSS).This issue affects Simple multi step form: from 0.0.0 before 2.0.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/simple_multistep"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-12761"
  }, {
    "type" : "PACKAGE",
    "url" : "https://git.drupalcode.org/project/simple_multistep"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/sa-contrib-2025-116"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-11-18T21:21:31Z",
    "nvd_published_at" : "2025-11-18T17:15:58Z"
  }
}