Vulnerability-Lookup

CNVD-2025-21453

Vulnerability from cnvd - Published: 2025-09-17

Title

Mattermost Confluence Plugin存在未明漏洞（CNVD-2025-21453）

Description

Mattermost Confluence Plugin是美国Mattermost公司的一个插件。 Mattermost Confluence Plugin存在安全漏洞，攻击者可利用该漏洞导致未经授权的频道订阅。

Severity

低

Patch Name

Mattermost Confluence Plugin存在未明漏洞（CNVD-2025-21453）的补丁

Patch Description

Mattermost Confluence Plugin是美国Mattermost公司的一个插件。 Mattermost Confluence Plugin存在安全漏洞，攻击者可利用该漏洞导致未经授权的频道订阅。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://mattermost.com/security-updates/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2025-8285

Impacted products

Name
Mattermost Confluence Plugin <1.5.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2025-8285",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2025-8285"
    }
  },
  "description": "Mattermost Confluence Plugin\u662f\u7f8e\u56fdMattermost\u516c\u53f8\u7684\u4e00\u4e2a\u63d2\u4ef6\u3002\n\nMattermost Confluence Plugin\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u672a\u7ecf\u6388\u6743\u7684\u9891\u9053\u8ba2\u9605\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://mattermost.com/security-updates/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-21453",
  "openTime": "2025-09-17",
  "patchDescription": "Mattermost Confluence Plugin\u662f\u7f8e\u56fdMattermost\u516c\u53f8\u7684\u4e00\u4e2a\u63d2\u4ef6\u3002\r\n\r\nMattermost Confluence Plugin\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u672a\u7ecf\u6388\u6743\u7684\u9891\u9053\u8ba2\u9605\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Mattermost Confluence Plugin\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2025-21453\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Mattermost Confluence Plugin \u003c1.5.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2025-8285",
  "serverity": "\u4f4e",
  "submitTime": "2025-08-15",
  "title": "Mattermost Confluence Plugin\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2025-21453\uff09"
}

CVE-2025-8285 (GCVE-0-2025-8285)

Vulnerability from cvelistv5 – Published: 2025-08-11 18:57 – Updated: 2025-08-11 19:41

Title

Unauthorized Channel Subscription Creation in Mattermost Confluence Plugin

Summary

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to create channel subscription without proper access to the channel via API call to the create channel subscription endpoint.

Severity

4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-11 19:41 UTC

CWE

CWE-862 - Missing Authorization

Assigner

Mattermost mitre root

References

1 reference

URL	Tags
https://mattermost.com/security-updates

Impacted products

1 product

Vendor	Product	Version
Mattermost	Mattermost Confluence Plugin	Affected: 0 , < 1.5.0 (semver) Unaffected: 1.5.0

Credits

Lorenzo Gallegos

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-8285",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-11T19:41:10.555989Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-11T19:41:20.762Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Mattermost Confluence Plugin",
          "repo": "https://github.com/mattermost/mattermost-plugin-confluence/",
          "vendor": "Mattermost",
          "versions": [
            {
              "lessThan": "1.5.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "1.5.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Lorenzo Gallegos"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Mattermost Confluence Plugin version \u003c1.5.0 fails to check the access of the user to the channel which allows attackers to create channel subscription without proper access to the channel via API call to the create channel subscription endpoint."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.1"
          },
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          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
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              "description": "CWE-862: Missing Authorization",
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              "type": "CWE"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-11T18:57:07.701Z",
        "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "shortName": "Mattermost"
      },
      "references": [
        {
          "url": "https://mattermost.com/security-updates"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update Mattermost Confluence Plugin to version 1.5.0 or higher."
        }
      ],
      "source": {
        "advisory": "MMSA-2025-00484",
        "defect": [
          "https://mattermost.atlassian.net/browse/MM-64166"
        ],
        "discovery": "{\"self\"=\u003e\"https://mattermost.atlassian.net/rest/api/2/customFieldOption/10557\", \"value\"=\u003e\"Internal\", \"id\"=\u003e\"10557\"}"
      },
      "title": "Unauthorized Channel Subscription Creation in Mattermost Confluence Plugin"
    }
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  "cveMetadata": {
    "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
    "assignerShortName": "Mattermost",
    "cveId": "CVE-2025-8285",
    "datePublished": "2025-08-11T18:57:07.701Z",
    "dateReserved": "2025-07-28T14:30:58.333Z",
    "dateUpdated": "2025-08-11T19:41:20.762Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

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.