UBUNTU-CVE-2025-6493

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Source
https://ubuntu.com/security/CVE-2025-6493
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6493.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-6493
Upstream
Published
2025-06-22T22:15:00Z
Modified
2026-01-20T18:39:02.473441Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A weakness has been identified in CodeMirror up to 5.65.20. Affected is an unknown function of the file mode/markdown/markdown.js of the component Markdown Mode. This manipulation causes inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited. Upgrading to version 6.0 is able to address this issue. You should upgrade the affected component. Not all code samples mentioned in the GitHub issue can be found. The repository mentions, that "CodeMirror 6 exists, and is [...] much more actively maintained."

References

Affected packages

Ubuntu:16.04:LTS
codemirror-js

Package

Name
codemirror-js
Purl
pkg:deb/ubuntu/codemirror-js@5.4.0-1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.4.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.4.0-1",
            "binary_name": "libjs-codemirror"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6493.json"
Ubuntu:18.04:LTS
codemirror-js

Package

Name
codemirror-js
Purl
pkg:deb/ubuntu/codemirror-js@5.19.0-1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.4.0-1
5.19.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.19.0-1",
            "binary_name": "libjs-codemirror"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6493.json"
Ubuntu:20.04:LTS
codemirror-js

Package

Name
codemirror-js
Purl
pkg:deb/ubuntu/codemirror-js@5.51.0-1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.43.0-1
5.49.2-1
5.50.2-1
5.51.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.51.0-1",
            "binary_name": "libjs-codemirror"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6493.json"
Ubuntu:22.04:LTS
codemirror-js

Package

Name
codemirror-js
Purl
pkg:deb/ubuntu/codemirror-js@5.65.0+~cs5.83.9-1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.59.2+~cs0.23.109-1
5.62.2+~cs5.83.6-1
5.63.3+~cs5.83.9-1
5.65.0+~cs5.83.9-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.65.0+~cs5.83.9-1",
            "binary_name": "libjs-codemirror"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6493.json"
Ubuntu:24.04:LTS
codemirror-js

Package

Name
codemirror-js
Purl
pkg:deb/ubuntu/codemirror-js@5.65.0+~cs5.83.9-3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.65.0+~cs5.83.9-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.65.0+~cs5.83.9-3",
            "binary_name": "libjs-codemirror"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6493.json"
Ubuntu:25.10
codemirror-js

Package

Name
codemirror-js
Purl
pkg:deb/ubuntu/codemirror-js@5.65.0+~cs5.83.9-3?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.65.0+~cs5.83.9-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.65.0+~cs5.83.9-3",
            "binary_name": "libjs-codemirror"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6493.json"