CVE-2020-19825: Kimai/kimai Cross-Site Scripting Vulnerability

CRITICAL
Advisory Identifier: GHSA-r58m-v5pr-jhhq
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CVSS 9.6
CWE-79
Published
Advisory Summary

CVE-2020-19825 is a CRITICAL (CVSS 9.6) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Kimai/kimai libraries in the Packagist ecosystem. The issue involves cross-site scripting in kimai/kimai. Remediation is available by upgrading affected packages to version 1.1.

CVE-2020-19825 at a Glance

CVE Identifier CVE-2020-19825
GHSA Identifier GHSA-r58m-v5pr-jhhq
Severity CRITICAL
CVSS v3.1 Base Score 9.6
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Kimai/kimai
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.6

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:H/I:H/A:H).

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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-19825

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

kimai/kimai fixed: 1.1 
Upgrade kimai/kimai to 1.1
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 kimai/kimai

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-19825, inspect your project dependencies for Kimai/kimai:

inspect dependencies for kimai/kimai

Analyze the terminal output to locate any version of Kimai/kimai in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.1), 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 Kimai/kimai, 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

Cross Site Scripting (XSS) vulnerability in kevinpapst kimai2 in /src/Twig/Runtime/MarkdownExtension.php, allows attackers to gain escalated privileges.

CVE-2020-19825 Affected Kimai/kimai Versions

1 component(s)
Fixed Versions:
1.1
Product / Package Ecosystem Affected Versions Fixed Version
kimai/kimai
 Packagist
< 1.1
1.1

References

Kimai/kimai Source Repository REPOSITORY
https://github.com/kevinpapst/kimai2/pull/962/files
Kimai/kimai Source Repository REPOSITORY
https://github.com/kimai/kimai/pull/962
Kimai/kimai Source Repository REPOSITORY
https://github.com/kevinpapst/kimai2
Kimai/kimai Release RELEASE
https://github.com/kimai/kimai/releases/tag/1.1
Kimai/kimai Source Repository REPOSITORY
https://github.com/kimai/kimai1
NVD — CVE-2020-19825 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-19825

Frequently Asked Questions

What is CVE-2020-19825?
CVE-2020-19825 is a security vulnerability in Kimai/kimai involving Cross-site Scripting in kimai/kimai under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Kimai/kimai versions are affected?
Affected versions include releases prior to 1.1 across affected packages: kimai/kimai.
What version fixes CVE-2020-19825?
Upgrading to 1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is kimai/kimai affected?
Yes, kimai/kimai is affected in releases prior to 1.1. Upgrade your dependency to 1.1 or later.
What is the CVSS score of CVE-2020-19825?
CVE-2020-19825 has a CVSS v3.1 base score of 9.6 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2020-19825?
CVE-2020-19825 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-2020-19825?
Run the dependency tree command: 'inspect dependencies for kimai/kimai'. 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-r58m-v5pr-jhhq",
  "modified" : "2023-02-23T22:05:42Z",
  "published" : "2023-02-16T00:30:28Z",
  "aliases" : [ "CVE-2020-19825" ],
  "summary" : "Cross-site Scripting in kimai/kimai",
  "details" : "Cross Site Scripting (XSS) vulnerability in kevinpapst kimai2 in /src/Twig/Runtime/MarkdownExtension.php, allows attackers to gain escalated privileges.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "kimai/kimai"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-19825"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kevinpapst/kimai2/pull/962/files"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kimai/kimai/pull/962"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kevinpapst/kimai2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kimai/kimai/releases/tag/1.1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kimai/kimai1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-16T14:10:11Z",
    "nvd_published_at" : "2023-02-15T22:15:00Z"
  }
}