CVE-2025-6493

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-6493
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."

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

5.0 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
https://github.com/codemirror/codemirror5/issues/7128
https://vuldb.com/?ctiid.313610
https://vuldb.com/?id.313610
https://vuldb.com/?submit.598875
Configurations

No configuration.

History

29 Sep 2025, 14:16

Type Values Removed Values Added
Summary (en) A vulnerability was found in CodeMirror up to 5.17.0 and classified as problematic. Affected by this issue is some unknown functionality of the file mode/markdown/markdown.js of the component Markdown Mode. The manipulation leads to inefficient regular expression complexity. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. 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." (en) 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."

23 Jun 2025, 20:16

Type Values Removed Values Added
Summary
  • (es) Se encontró una vulnerabilidad en CodeMirror hasta la versión 5.17.0 y se clasificó como problemática. Este problema afecta a una funcionalidad desconocida del archivo mode/markdown/markdown.js del componente Markdown Mode. La manipulación genera una complejidad ineficiente en las expresiones regulares. El ataque puede ejecutarse en remoto. Se ha hecho público el exploit y puede que sea utilizado. No se pueden encontrar todos los ejemplos de código mencionados en el problema de GitHub. El repositorio menciona que «CodeMirror 6 existe y se mantiene de forma mucho más activa».

22 Jun 2025, 22:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-22 22:15

Updated : 2025-09-29 14:16

NVD link : CVE-2025-6493

Mitre link : CVE-2025-6493

CVE.ORG link : CVE-2025-6493

JSON object : View

Products Affected

No product.

CWE
CWE-400

Uncontrolled Resource Consumption

CWE-1333

Inefficient Regular Expression Complexity