Vulnerabilities in pkg:npm/formstone

PACKAGE
Advisory Identifier: GHSA-wc29-h54q-q8qx
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Advisory Summary

CVE-2020-26768 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Formstone libraries in the npm ecosystem. The issue involves formstone vulnerable to reflected xss. Remediation is available by upgrading affected packages to version 1.4.17.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/formstone

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/formstone. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-wc29-h54q-q8qx CVE-2020-26768 MODERATE Formstone Vulnerable to Reflected XSS

CVE-2020-26768 at a Glance

CVE Identifier CVE-2020-26768
GHSA Identifier GHSA-wc29-h54q-q8qx
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 Formstone
Package Ecosystem npm
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-2020-26768

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

formstone fixed: 1.4.17 
npm install formstone@1.4.17
Verify Direct and Transitive Dependencies

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

npm ls formstone

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-26768, inspect your project dependencies using npm:

npm ls formstone

Analyze the terminal output to locate any version of Formstone in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.4.17), your application is affected.

Note: The npm ls formstone command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

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 Formstone, 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

Formstone <=1.4.16 is vulnerable to a Reflected Cross-Site Scripting (XSS) vulnerability caused by improper validation of user supplied input in the `upload-target.php` and `upload-chunked.php` files. A remote attacker could exploit this vulnerability using a specially crafted URL to execute a script in a victim's Web browser within the security context of the hosting Web site once the URL is clicked or visited. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials, force malware execution, user redirection and others.

CVE-2020-26768 Affected Formstone Versions

1 component(s)
Fixed Versions:
1.4.17
Product / Package Ecosystem Affected Versions Fixed Version
formstone
npm/formstone
npm
< 1.4.17
1.4.17

References

NVD — CVE-2020-26768 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-26768
Formstone Source Repository REPOSITORY
https://github.com/Formstone/Formstone/issues/286
Security Fix Commit FIX COMMIT
https://github.com/Formstone/Formstone/commit/b067f31f5f6a0acd3ade4fd6dccae6e3633caa02

Frequently Asked Questions

What is CVE-2020-26768?
CVE-2020-26768 is a security vulnerability in Formstone involving Formstone Vulnerable to Reflected XSS under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Formstone versions are affected?
Affected versions include releases prior to 1.4.17 across affected packages: formstone.
What version fixes CVE-2020-26768?
Upgrading to 1.4.17 (or the latest patched release for your respective branch) resolves the vulnerability.
Is formstone affected?
Yes, formstone is affected in releases prior to 1.4.17. Upgrade your dependency to 1.4.17 or later.
What is the CVSS score of CVE-2020-26768?
CVE-2020-26768 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-2020-26768?
CVE-2020-26768 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 npm dependencies for CVE-2020-26768?
Run the dependency tree command: 'npm ls formstone'. 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-wc29-h54q-q8qx",
  "modified" : "2024-04-01T22:02:55Z",
  "published" : "2022-05-24T17:38:12Z",
  "aliases" : [ "CVE-2020-26768" ],
  "summary" : "Formstone Vulnerable to Reflected XSS",
  "details" : "Formstone <=1.4.16 is vulnerable to a Reflected Cross-Site Scripting (XSS) vulnerability caused by improper validation of user supplied input in the `upload-target.php` and `upload-chunked.php` files. A remote attacker could exploit this vulnerability using a specially crafted URL to execute a script in a victim's Web browser within the security context of the hosting Web site once the URL is clicked or visited. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials, force malware execution, user redirection and others.",
  "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" : "npm",
      "name" : "formstone"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.17"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.4.16"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-26768"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Formstone/Formstone/issues/286"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Formstone/Formstone/commit/b067f31f5f6a0acd3ade4fd6dccae6e3633caa02"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-01T22:02:55Z",
    "nvd_published_at" : "2021-01-07T13:15:00Z"
  }
}