Vulnerability-Lookup

CVE-2025-14265 (GCVE-0-2025-14265)

Vulnerability from cvelistv5 – Published: 2025-12-11 14:21 – Updated: 2026-02-26 16:21

Title

Improper server-side validation in ScreenConnect extension framework

Summary

In versions of ScreenConnect™ prior to 25.8, server-side validation and integrity checks within the extension subsystem could allow the installation and execution of untrusted or arbitrary extensions by authorized or administrative users. Abuse of this behavior could result in the execution of custom code on the server or unauthorized access to application configuration data. This issue affects only the ScreenConnect server component; host and guest clients are not impacted. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-12 04:55 UTC

CWE

CWE-494 - Download of Code Without Integrity Check

Assigner

ConnectWise CNA under the mitre root

CNA scorecard – unranked: 3 records in the last 180 days, 10 needed details

References

1 reference

URL	Tags
https://www.connectwise.com/company/trust/securit…

Impacted products

1 product

Vendor	Product	Version	CPE status
ConnectWise	ScreenConnect	Affected: All versions prior to 2025.8	guessed

Credits

Paul Whiting (Ultraviolet Cyber)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-14265

Vulnerability from fkie_nvd - Published: 2025-12-11 15:15 - Updated: 2026-10-07 20:10

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	7d616e1a-3288-43b1-a0dd-0a65d3e70a49	https://www.connectwise.com/company/trust/security-bulletins/screenconnect-2025.8-security-patch	Vendor Advisory

Impacted products

	Vendor	Product	Version
	connectwise	screenconnect	*

JSON

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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Web Application Server"
          ],
          "product": "ScreenConnect",
          "vendor": "ConnectWise",
          "versions": [
            {
              "status": "affected",
              "version": "All versions prior to 2025.8"
            }
          ]
        }
      ],
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:connectwise:screenconnect:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "19C5783B-C6B5-4181-80A0-082DF09B007B",
              "versionEndExcluding": "25.8.0.9438",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In versions of ScreenConnect\u2122 prior to 25.8, server-side validation and integrity checks within the extension subsystem could allow the installation and execution of untrusted or arbitrary extensions by authorized or administrative users. Abuse of this behavior could result in the execution of custom code on the server or unauthorized access to application configuration data. This issue affects only the ScreenConnect server component; host and guest clients are not impacted. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed."
    },
    {
      "lang": "es",
      "value": "En versiones de ScreenConnect\u2122 anteriores a la 25.8, la validaci\u00f3n del lado del servidor y las comprobaciones de integridad dentro del subsistema de extensiones podr\u00edan permitir la instalaci\u00f3n y ejecuci\u00f3n de extensiones no confiables o arbitrarias por parte de usuarios autorizados o administrativos. El abuso de este comportamiento podr\u00eda resultar en la ejecuci\u00f3n de c\u00f3digo personalizado en el servidor o acceso no autorizado a datos de configuraci\u00f3n de la aplicaci\u00f3n. Este problema afecta solo al componente de servidor de ScreenConnect; los clientes anfitri\u00f3n y invitado no se ven afectados. ScreenConnect 25.8 introduce un manejo mejorado de la configuraci\u00f3n del lado del servidor y comprobaciones de integridad para asegurar que solo se puedan instalar extensiones confiables."
    }
  ],
  "id": "CVE-2025-14265",
  "lastModified": "2026-10-07T20:10:01.970",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-14265",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-12-12T04:55:51.377077Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-11T15:15:46.863",
  "references": [
    {
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.connectwise.com/company/trust/security-bulletins/screenconnect-2025.8-security-patch"
    }
  ],
  "sourceIdentifier": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-494"
        }
      ],
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
      "type": "Secondary"
    }
  ]
}

GHSA-3HJ4-MQ9Q-JPMJ

Vulnerability from github – Published: 2025-12-11 15:30 – Updated: 2025-12-11 15:30

Details

Severity

9.1 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-14265"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-494"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-11T15:15:46Z",
    "severity": "CRITICAL"
  },
  "details": "In versions of ScreenConnect\u2122 prior to 25.8, server-side validation and integrity checks within the extension subsystem could allow the installation and execution of untrusted or arbitrary extensions by authorized or administrative users. Abuse of this behavior could result in the execution of custom code on the server or unauthorized access to application configuration data. This issue affects only the ScreenConnect server component; host and guest clients are not impacted. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed.",
  "id": "GHSA-3hj4-mq9q-jpmj",
  "modified": "2025-12-11T15:30:32Z",
  "published": "2025-12-11T15:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-14265"
    },
    {
      "type": "WEB",
      "url": "https://www.connectwise.com/company/trust/security-bulletins/screenconnect-2025.8-security-patch"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

WID-SEC-W-2025-2831

Vulnerability from csaf_certbund - Published: 2025-12-11 23:00 - Updated: 2025-12-11 23:00

Summary

ConnectWise ScreenConnect: Schwachstelle ermöglicht Codeausführung

Severity

Hoch

Scope

1 vulnerability in this advisory, including CVE-2025-14265.

CVE-2025-14265

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-14265 (GCVE-0-2025-14265)

FKIE_CVE-2025-14265

GHSA-3HJ4-MQ9Q-JPMJ

WID-SEC-W-2025-2831

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Sightings

Nomenclature

Vulnerability timeline

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