CVE-2018-3755: Sexstatic Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-qfh2-6f7q-gr86
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2018-3755 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Sexstatic libraries in the npm ecosystem. The issue involves cross-site scripting in sexstatic. Remediation is available in the latest vendor maintenance releases.

CVE-2018-3755 at a Glance

CVE Identifier CVE-2018-3755
GHSA Identifier GHSA-qfh2-6f7q-gr86
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 Sexstatic
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-2018-3755

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

sexstatic fixed: Latest secure release 
npm install sexstatic@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: 

npm ls sexstatic

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2018-3755, inspect your project dependencies using npm:

npm ls sexstatic

Analyze the terminal output to locate any version of Sexstatic 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 npm ls sexstatic 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 Sexstatic, 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

All versions of `sexstatic` are vulnerable to stored cross-site scripting (xss). This is exploitable if an attacker can control a filename that is served by `sexstatic`. ## Recommendation As there is no fix is currently available for this vulnerability it is our recommendation to not install or used this module at this time.

CVE-2018-3755 Affected Sexstatic Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
sexstatic
npm/sexstatic
npm
≤ 0.6.2

References

NVD — CVE-2018-3755 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-3755
hackerone.com/reports/328210 WEB
https://hackerone.com/reports/328210
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-qfh2-6f7q-gr86
www.npmjs.com/advisories/671 WEB
https://www.npmjs.com/advisories/671

Frequently Asked Questions

What is CVE-2018-3755?
CVE-2018-3755 is a security vulnerability in Sexstatic involving Cross-Site Scripting in sexstatic under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Sexstatic versions are affected?
Affected versions include releases prior to current release patches across affected packages: sexstatic.
What version fixes CVE-2018-3755?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is sexstatic affected?
Yes, sexstatic 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-2018-3755?
CVE-2018-3755 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-2018-3755?
CVE-2018-3755 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-2018-3755?
Run the dependency tree command: 'npm ls sexstatic'. 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-qfh2-6f7q-gr86",
  "modified" : "2023-03-01T01:24:43Z",
  "published" : "2018-10-01T16:30:38Z",
  "aliases" : [ "CVE-2018-3755" ],
  "summary" : "Cross-Site Scripting in sexstatic",
  "details" : "All versions of `sexstatic` are vulnerable to stored cross-site scripting (xss). This is exploitable if an attacker can control a filename that is served by `sexstatic`.\n\n\n\n## Recommendation\n\nAs there is no fix is currently available for this vulnerability it is our recommendation to not install or used this module at this time.",
  "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" : "sexstatic"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.6.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-3755"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/328210"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-qfh2-6f7q-gr86"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/671"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:51:42Z",
    "nvd_published_at" : "2018-06-01T17:29:00Z"
  }
}