github - ghsa-pff4-9qxc-79mq

GHSA-PFF4-9QXC-79MQ

Vulnerability from github – Published: 2025-06-23 00:30 – Updated: 2025-06-23 00:30

Details

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."

Severity ?

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

5.5 (Medium)


                  
                    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

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-6493"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-22T22:15:22Z",
    "severity": "MODERATE"
  },
  "details": "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.\"",
  "id": "GHSA-pff4-9qxc-79mq",
  "modified": "2025-06-23T00:30:19Z",
  "published": "2025-06-23T00:30:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6493"
    },
    {
      "type": "WEB",
      "url": "https://github.com/codemirror/codemirror5/issues/7128"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.313610"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.313610"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.598875"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2025-6493 (GCVE-0-2025-6493)

Vulnerability from cvelistv5 – Published: 2025-06-22 22:00 – Updated: 2025-09-29 13:48

Title

CodeMirror Markdown Mode markdown.js redos

Summary

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."

Severity ?

6.9 (Medium)


                        
                          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

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

CWE

CWE-1333 - Inefficient Regular Expression Complexity
CWE-400 - Resource Consumption

Assigner

VulDB

References

URL

Tags

	https://vuldb.com/?id.313610	vdb-entrytechnical-description
	https://vuldb.com/?ctiid.313610	signaturepermissions-required
	https://vuldb.com/?submit.598875	third-party-advisory
	https://github.com/codemirror/codemirror5/issues/7128	exploitissue-tracking

Impacted products

	Vendor	Product	Version
	n/a	CodeMirror	Affected: 5.65.0 Affected: 5.65.1 Affected: 5.65.2 Affected: 5.65.3 Affected: 5.65.4 Affected: 5.65.5 Affected: 5.65.6 Affected: 5.65.7 Affected: 5.65.8 Affected: 5.65.9 Affected: 5.65.10 Affected: 5.65.11 Affected: 5.65.12 Affected: 5.65.13 Affected: 5.65.14 Affected: 5.65.15 Affected: 5.65.16 Affected: 5.65.17 Affected: 5.65.18 Affected: 5.65.19 Affected: 5.65.20 Unaffected: 6.0

Credits

DayShift (VulDB User)

Show details on NVD website

JSON

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            "other": {
              "content": {
                "id": "CVE-2025-6493",
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            {
              "status": "affected",
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            {
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              "version": "5.65.11"
            },
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              "status": "affected",
              "version": "5.65.12"
            },
            {
              "status": "affected",
              "version": "5.65.13"
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            {
              "status": "affected",
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        },
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-PFF4-9QXC-79MQ

CVE-2025-6493 (GCVE-0-2025-6493)

Tags

Sightings

Nomenclature