FKIE_CVE-2025-53971
Vulnerability from fkie_nvd - Published: 2025-08-21 08:15 - Updated: 2026-06-17 09:39
Severity
Summary
Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint.
References
| URL | Tags | ||
|---|---|---|---|
| responsibledisclosure@mattermost.com | https://mattermost.com/security-updates | Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| mattermost | mattermost_server | * | |
| mattermost | mattermost_server | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Mattermost",
"vendor": "Mattermost",
"versions": [
{
"lessThanOrEqual": "10.5.8",
"status": "affected",
"version": "10.5.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "9.11.17",
"status": "affected",
"version": "9.11.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "10.10.0"
},
{
"status": "unaffected",
"version": "10.5.9"
},
{
"status": "unaffected",
"version": "9.11.18"
}
]
}
],
"source": "responsibledisclosure@mattermost.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4E2C0E13-B52A-4539-80B6-DC0FE8FF2E56",
"versionEndExcluding": "9.11.18",
"versionStartIncluding": "9.11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B95DCAE5-07C2-46B1-B03E-ED3FB9B2C568",
"versionEndExcluding": "10.5.9",
"versionStartIncluding": "10.5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Mattermost versions 10.5.x \u003c= 10.5.8, 9.11.x \u003c= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint."
},
{
"lang": "es",
"value": "Las versiones de Mattermost 10.5.x \u0026lt;= 10.5.8, 9.11.x \u0026lt;= 9.11.17 no pueden validar correctamente la autorizaci\u00f3n para las modificaciones de roles del esquema de equipo, lo que permite a los administradores de equipo degradar a los miembros del equipo a invitados a trav\u00e9s del endpoint de API PUT /api/v4/teams/team-id/members/user-id/schemeRoles."
}
],
"id": "CVE-2025-53971",
"lastModified": "2026-06-17T09:39:12.823",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.8,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.2,
"impactScore": 2.5,
"source": "responsibledisclosure@mattermost.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-53971",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-08-21T14:51:10.911929Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-08-21T08:15:30.540",
"references": [
{
"source": "responsibledisclosure@mattermost.com",
"tags": [
"Vendor Advisory"
],
"url": "https://mattermost.com/security-updates"
}
],
"sourceIdentifier": "responsibledisclosure@mattermost.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-863"
}
],
"source": "responsibledisclosure@mattermost.com",
"type": "Secondary"
}
]
}
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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.
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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.
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.
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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.
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