CVE-2021-3985: Kevinpapst/kimai2 Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-x68c-4gmm-5g43
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CVSS 8.0
CWE-79
Published
Advisory Summary

CVE-2021-3985 is a HIGH (CVSS 8.0) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Kevinpapst/kimai2 libraries in the Packagist ecosystem. The issue involves kimai2 is vulnerable to cross-site scripting. Remediation is available by upgrading affected packages to version 1.16.3.

CVE-2021-3985 at a Glance

CVE Identifier CVE-2021-3985
GHSA Identifier GHSA-x68c-4gmm-5g43
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Kevinpapst/kimai2
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-3985

To remediate this vulnerability, upgrade all affected Kevinpapst/kimai2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

kevinpapst/kimai2 fixed: 1.16.3 
Upgrade kevinpapst/kimai2 to 1.16.3
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 kevinpapst/kimai2

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-3985, inspect your project dependencies for Kevinpapst/kimai2:

inspect dependencies for kevinpapst/kimai2

Analyze the terminal output to locate any version of Kevinpapst/kimai2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.16.3), 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 Kevinpapst/kimai2, 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

kimai2 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').

CVE-2021-3985 Affected Kevinpapst/kimai2 Versions

1 component(s)
Fixed Versions:
1.16.3
Product / Package Ecosystem Affected Versions Fixed Version
kevinpapst/kimai2
 Packagist
< 1.16.3
1.16.3

References

NVD — CVE-2021-3985 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3985
Security Fix Commit FIX COMMIT
https://github.com/kevinpapst/kimai2/commit/76e09447c85e762882126b49626a4fe4d93fe8b5
Kevinpapst/kimai2 Source Repository REPOSITORY
https://github.com/kevinpapst/kimai2
Kevinpapst/kimai2 Release RELEASE
https://github.com/kevinpapst/kimai2/releases/tag/1.16.3
huntr.dev/bounties/89d6c3de-e... WEB
https://huntr.dev/bounties/89d6c3de-efbd-4354-8cc8-46e999e4c5a4

Frequently Asked Questions

What is CVE-2021-3985?
CVE-2021-3985 is a security vulnerability in Kevinpapst/kimai2 involving kimai2 is vulnerable to Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Kevinpapst/kimai2 versions are affected?
Affected versions include releases prior to 1.16.3 across affected packages: kevinpapst/kimai2.
What version fixes CVE-2021-3985?
Upgrading to 1.16.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is kevinpapst/kimai2 affected?
Yes, kevinpapst/kimai2 is affected in releases prior to 1.16.3. Upgrade your dependency to 1.16.3 or later.
What is the CVSS score of CVE-2021-3985?
CVE-2021-3985 has a CVSS v3.1 base score of 8.0 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-3985?
CVE-2021-3985 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-2021-3985?
Run the dependency tree command: 'inspect dependencies for kevinpapst/kimai2'. 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-x68c-4gmm-5g43",
  "modified" : "2021-12-03T15:19:53Z",
  "published" : "2021-12-03T20:40:38Z",
  "aliases" : [ "CVE-2021-3985" ],
  "summary" : "kimai2 is vulnerable to Cross-site Scripting",
  "details" : "kimai2 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "kevinpapst/kimai2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.16.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-3985"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kevinpapst/kimai2/commit/76e09447c85e762882126b49626a4fe4d93fe8b5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kevinpapst/kimai2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kevinpapst/kimai2/releases/tag/1.16.3"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/89d6c3de-efbd-4354-8cc8-46e999e4c5a4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-12-02T21:25:44Z",
    "nvd_published_at" : "2021-12-01T11:15:00Z"
  }
}