CVE-2021-4263: Github.com/leanote/leanote Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-6cmv-2548-82v4
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2021-4263 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Github.com/leanote/leanote libraries in the Go ecosystem. The issue involves leanote vulnerable to cross-site scripting. Remediation is available in the latest vendor maintenance releases.

CVE-2021-4263 at a Glance

CVE Identifier CVE-2021-4263
GHSA Identifier GHSA-6cmv-2548-82v4
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 Github.com/leanote/leanote
Package Ecosystem Go
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-2021-4263

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

github.com/leanote/leanote fixed: Latest secure release 
Upgrade github.com/leanote/leanote to 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: 

inspect dependencies for github.com/leanote/leanote

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-4263, inspect your project dependencies for Github.com/leanote/leanote:

inspect dependencies for github.com/leanote/leanote

Analyze the terminal output to locate any version of Github.com/leanote/leanote 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: 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 Github.com/leanote/leanote, 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

A vulnerability, which was classified as problematic, has been found in leanote. This issue affects the function define of the file `public/js/plugins/history.js`. The manipulation of the argument content leads to cross site scripting. The attack may be initiated remotely. The name of the patch is https:/github.com/leanote/leanote/commit/0f9733c890077942150696dcc6d2b1482b7a0a19. It is recommended to apply a patch to fix this issue. The identifier VDB-216461 was assigned to this vulnerability.

CVE-2021-4263 Affected Github.com/leanote/leanote Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
github.com/leanote/leanote
golang/github.com/leanote/leanote
Go
≤ 2.6.1

References

NVD — CVE-2021-4263 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4263
Security Fix Commit FIX COMMIT
https://github.com/leanote/leanote/commit/0f9733c890077942150696dcc6d2b1482b7a0a19
Github.com/leanote/leanote Source Repository REPOSITORY
https://github.com/leanote/leanote
vuldb.com/ WEB
https://vuldb.com/?ctiid.216461
vuldb.com/ WEB
https://vuldb.com/?id.216461

Frequently Asked Questions

What is CVE-2021-4263?
CVE-2021-4263 is a security vulnerability in Github.com/leanote/leanote involving leanote vulnerable to cross-site scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Github.com/leanote/leanote versions are affected?
Affected versions include releases prior to current release patches across affected packages: github.com/leanote/leanote.
What version fixes CVE-2021-4263?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/leanote/leanote affected?
Yes, github.com/leanote/leanote 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-2021-4263?
CVE-2021-4263 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-2021-4263?
CVE-2021-4263 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 Go dependencies for CVE-2021-4263?
Run the dependency tree command: 'inspect dependencies for github.com/leanote/leanote'. 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-6cmv-2548-82v4",
  "modified" : "2023-10-20T23:01:17Z",
  "published" : "2022-12-21T21:30:15Z",
  "aliases" : [ "CVE-2021-4263" ],
  "summary" : "leanote vulnerable to cross-site scripting",
  "details" : "A vulnerability, which was classified as problematic, has been found in leanote. This issue affects the function define of the file `public/js/plugins/history.js`. The manipulation of the argument content leads to cross site scripting. The attack may be initiated remotely. The name of the patch is https:/github.com/leanote/leanote/commit/0f9733c890077942150696dcc6d2b1482b7a0a19. It is recommended to apply a patch to fix this issue. The identifier VDB-216461 was assigned to this vulnerability.",
  "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" : "Go",
      "name" : "github.com/leanote/leanote"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.6.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-4263"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/leanote/leanote/commit/0f9733c890077942150696dcc6d2b1482b7a0a19"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/leanote/leanote"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?ctiid.216461"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?id.216461"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-10-20T23:01:17Z",
    "nvd_published_at" : "2022-12-21T19:15:00Z"
  }
}