CVE-2020-7749: Osm static maps Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-pxcf-v868-m492
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CVSS 7.6
CWE-79 CWE-74
Published
Advisory Summary

CVE-2020-7749 is a HIGH (CVSS 7.6) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Osm static maps libraries in the npm ecosystem. The issue involves injection and cross-site scripting in osm-static-maps. Remediation is available by upgrading affected packages to version 3.9.0.

CVE-2020-7749 at a Glance

CVE Identifier CVE-2020-7749
GHSA Identifier GHSA-pxcf-v868-m492
Severity HIGH
CVSS v3.1 Base Score 7.6
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Osm static maps
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.6

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

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

How to Fix CVE-2020-7749

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

osm-static-maps fixed: 3.9.0 
npm install osm-static-maps@3.9.0
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 osm-static-maps

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-7749, inspect your project dependencies using npm:

npm ls osm-static-maps

Analyze the terminal output to locate any version of Osm static maps in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.9.0), your application is affected.

Note: The npm ls osm-static-maps 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 Osm static maps, 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

This affects all versions of package osm-static-maps under 3.9.0. User input given to the package is passed directly to a template without escaping `({{{ ... }}})`. As such, it is possible for an attacker to inject arbitrary HTML/JS code and depending on the context. It will be outputted as an HTML on the page which gives opportunity for XSS or rendered on the server (puppeteer) which also gives opportunity for SSRF and Local File Read.

CVE-2020-7749 Affected Osm static maps Versions

1 component(s)
Fixed Versions:
3.9.0
Product / Package Ecosystem Affected Versions Fixed Version
osm-static-maps
npm/osm-static-maps
npm
< 3.9.0
3.9.0

References

NVD — CVE-2020-7749 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7749
Osm static maps Source Repository REPOSITORY
https://github.com/jperelli/osm-static-maps/pull/24
Security Fix Commit FIX COMMIT
https://github.com/jperelli/osm-static-maps/commit/97355d29e08753d1cfe99b1281dbaa06f4e651b0
Osm static maps Source Repository REPOSITORY
https://github.com/jperelli/osm-static-maps/blob/master/src/template.html%23L142
snyk.io/vuln/snyk-js-osmsta... WEB
https://snyk.io/vuln/SNYK-JS-OSMSTATICMAPS-609637

Frequently Asked Questions

What is CVE-2020-7749?
CVE-2020-7749 is a security vulnerability in Osm static maps involving Injection and Cross-site Scripting in osm-static-maps under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Osm static maps versions are affected?
Affected versions include releases prior to 3.9.0 across affected packages: osm-static-maps.
What version fixes CVE-2020-7749?
Upgrading to 3.9.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is osm-static-maps affected?
Yes, osm-static-maps is affected in releases prior to 3.9.0. Upgrade your dependency to 3.9.0 or later.
What is the CVSS score of CVE-2020-7749?
CVE-2020-7749 has a CVSS v3.1 base score of 7.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.
What CWE is associated with CVE-2020-7749?
CVE-2020-7749 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-2020-7749?
Run the dependency tree command: 'npm ls osm-static-maps'. 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-pxcf-v868-m492",
  "modified" : "2023-09-11T20:22:40Z",
  "published" : "2021-05-10T18:43:45Z",
  "aliases" : [ "CVE-2020-7749" ],
  "summary" : "Injection and Cross-site Scripting in osm-static-maps",
  "details" : "This affects all versions of package osm-static-maps under 3.9.0. User input given to the package is passed directly to a template without escaping `({{{ ... }}})`. As such, it is possible for an attacker to inject arbitrary HTML/JS code and depending on the context. It will be outputted as an HTML on the page which gives opportunity for XSS or rendered on the server (puppeteer) which also gives opportunity for SSRF and Local File Read.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "osm-static-maps"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.9.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7749"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jperelli/osm-static-maps/pull/24"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jperelli/osm-static-maps/commit/97355d29e08753d1cfe99b1281dbaa06f4e651b0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jperelli/osm-static-maps/blob/master/src/template.html%23L142"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-OSMSTATICMAPS-609637"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74", "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-21T18:16:30Z",
    "nvd_published_at" : "2020-10-20T11:15:00Z"
  }
}