CVE-2025-9495 (GCVE-0-2025-9495)
Vulnerability from cvelistv5 – Published: 2025-09-23 01:16 – Updated: 2025-09-23 13:33
VLAI
EPSS
VEX
Title
Viessmann Vitogate 300 Authentication Bypass
Summary
The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser’s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-23 13:33 UTC
CWE
- CWE-602 - Client-Side Enforcement of Server-Side Security
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Viessmann | Vitogate 300 |
Affected:
1 , < 3.0.0.0
(date)
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-9495",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-23T13:33:41.544746Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-23T13:33:47.319Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Vitogate 300",
"vendor": "Viessmann",
"versions": [
{
"lessThan": "3.0.0.0",
"status": "affected",
"version": "1",
"versionType": "date"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Souvik Kandar of MicroSec (microsec.io)"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser\u2019s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device.\u003cbr\u003e"
}
],
"value": "The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser\u2019s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-602",
"description": "CWE-602 Client-Side Enforcement of Server-Side Security",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-23T01:16:53.619Z",
"orgId": "e24e6442-3ae1-4538-a7b8-7ac95586db8f",
"shortName": "Carrier"
},
"references": [
{
"url": "https://https://www.corporate.carrier.com/product-security/advisories-resources/"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003e\u003c/p\u003e\u003cp\u003eThese\nvulnerabilities have been fixed with Vitogate 300 software version 3.1.0.1. \u003c/p\u003e\n\n\u003cp\u003eCustomers\nare strongly encouraged to upgrade by downloading software version 3.1.0.1 or newer at the\n\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://connectivity.viessmann-climatesolutions.com/gb/mp-fp/vitogate/vitogate-300-bn-mb.html\"\u003eVitogate\n300 website.\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003c/p\u003e"
}
],
"value": "These\nvulnerabilities have been fixed with Vitogate 300 software version 3.1.0.1. \n\n\n\nCustomers\nare strongly encouraged to upgrade by downloading software version 3.1.0.1 or newer at the\nVitogate\n300 website."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Viessmann Vitogate 300 Authentication Bypass",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "e24e6442-3ae1-4538-a7b8-7ac95586db8f",
"assignerShortName": "Carrier",
"cveId": "CVE-2025-9495",
"datePublished": "2025-09-23T01:16:53.619Z",
"dateReserved": "2025-08-26T17:40:58.043Z",
"dateUpdated": "2025-09-23T13:33:47.319Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-9495",
"date": "2026-11-08",
"epss": "0.00241",
"percentile": "0.15272"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Vitogate 300",
"vendor": "Viessmann",
"versions": [
{
"lessThan": "3.0.0.0",
"status": "affected",
"version": "1",
"versionType": "date"
}
]
}
],
"source": "productsecurity@carrier.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser\u2019s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device."
},
{
"lang": "es",
"value": "La interfaz web de Vitogate 300 no logra aplicar una adecuada autenticaci\u00f3n del lado del servidor y se basa en controles de autenticaci\u00f3n basados en el frontend. Esto permite a un atacante simplemente modificar elementos HTML en las herramientas de desarrollador del navegador para eludir las restricciones de inicio de sesi\u00f3n. Al eliminar elementos espec\u00edficos de la interfaz de usuario, un atacante puede revelar el men\u00fa de administraci\u00f3n oculto, d\u00e1ndoles control total sobre el dispositivo."
}
],
"id": "CVE-2025-9495",
"lastModified": "2026-10-11T20:10:00.200",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "productsecurity@carrier.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-9495",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-23T13:33:41.544746Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-09-23T02:15:47.563",
"references": [
{
"source": "productsecurity@carrier.com",
"url": "https://https://www.corporate.carrier.com/product-security/advisories-resources/"
}
],
"sourceIdentifier": "productsecurity@carrier.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-602"
}
],
"source": "productsecurity@carrier.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-09-25T02:53:46+00:00",
"cve": "CVE-2025-9495",
"id": "CVE-2025-9495",
"initial_release_date": "2025-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Viessmann Vitogate 300 Authentication Bypass",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-9495.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-9495",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-23T13:33:41.544746Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-23T13:33:44.366Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Vitogate 300",
"vendor": "Viessmann",
"versions": [
{
"lessThan": "3.0.0.0",
"status": "affected",
"version": "1",
"versionType": "date"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Souvik Kandar of MicroSec (microsec.io)"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser\u2019s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device.\u003cbr\u003e"
}
],
"value": "The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser\u2019s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-602",
"description": "CWE-602 Client-Side Enforcement of Server-Side Security",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-23T01:16:53.619Z",
"orgId": "e24e6442-3ae1-4538-a7b8-7ac95586db8f",
"shortName": "Carrier"
},
"references": [
{
"url": "https://https://www.corporate.carrier.com/product-security/advisories-resources/"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003e\u003c/p\u003e\u003cp\u003eThese\nvulnerabilities have been fixed with Vitogate 300 software version 3.1.0.1. \u003c/p\u003e\n\n\u003cp\u003eCustomers\nare strongly encouraged to upgrade by downloading software version 3.1.0.1 or newer at the\n\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://connectivity.viessmann-climatesolutions.com/gb/mp-fp/vitogate/vitogate-300-bn-mb.html\"\u003eVitogate\n300 website.\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003c/p\u003e"
}
],
"value": "These\nvulnerabilities have been fixed with Vitogate 300 software version 3.1.0.1. \n\n\n\nCustomers\nare strongly encouraged to upgrade by downloading software version 3.1.0.1 or newer at the\nVitogate\n300 website."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Viessmann Vitogate 300 Authentication Bypass",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "e24e6442-3ae1-4538-a7b8-7ac95586db8f",
"assignerShortName": "Carrier",
"cveId": "CVE-2025-9495",
"datePublished": "2025-09-23T01:16:53.619Z",
"dateReserved": "2025-08-26T17:40:58.043Z",
"dateUpdated": "2025-09-23T13:33:47.319Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
Loading…
Loading…
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.
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.
Loading…
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.