GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-12756 (GCVE-0-2025-12756)

Vulnerability from cvelistv5 – Published: 2025-12-01 19:51 – Updated: 2025-12-01 20:02
VLAI
Title
Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion
Summary
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-01 20:01 UTC
CWE
  • CWE-863 - Incorrect Authorization
References
Impacted products
Vendor Product Version CPE status
Mattermost Mattermost Affected: 11.0.0 , ≤ 11.0.2 (semver)
Affected: 10.12.0 , ≤ 10.12.1 (semver)
Affected: 10.11.0 , ≤ 10.11.4 (semver)
Affected: 10.5.0 , ≤ 10.5.12 (semver)
Unaffected: 11.1.0
Unaffected: 11.0.3
Unaffected: 10.12.2
Unaffected: 10.11.5
Unaffected: 10.5.13
guessed Create a notification for this product.
Credits
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-12756",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-01T20:01:59.250891Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-01T20:02:24.869Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Mattermost",
          "vendor": "Mattermost",
          "versions": [
            {
              "lessThanOrEqual": "11.0.2",
              "status": "affected",
              "version": "11.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.12.1",
              "status": "affected",
              "version": "10.12.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.11.4",
              "status": "affected",
              "version": "10.11.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.5.12",
              "status": "affected",
              "version": "10.5.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "11.1.0"
            },
            {
              "status": "unaffected",
              "version": "11.0.3"
            },
            {
              "status": "unaffected",
              "version": "10.12.2"
            },
            {
              "status": "unaffected",
              "version": "10.11.5"
            },
            {
              "status": "unaffected",
              "version": "10.5.13"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "daynight"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Mattermost versions 11.0.x \u003c= 11.0.2, 10.12.x \u003c= 10.12.1, 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-01T19:51:46.289Z",
        "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "shortName": "Mattermost"
      },
      "references": [
        {
          "url": "https://mattermost.com/security-updates"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update Mattermost to versions 11.1.0, 11.0.3, 10.12.2, 10.11.5, 10.5.13 or higher."
        }
      ],
      "source": {
        "advisory": "MMSA-2025-00530",
        "defect": [
          "https://mattermost.atlassian.net/browse/MM-65965"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
    "assignerShortName": "Mattermost",
    "cveId": "CVE-2025-12756",
    "datePublished": "2025-12-01T19:51:46.289Z",
    "dateReserved": "2025-11-05T15:23:20.065Z",
    "dateUpdated": "2025-12-01T20:02:24.869Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-12756",
      "date": "2026-09-17",
      "epss": "0.00181",
      "percentile": "0.07935"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-12756\",\"sourceIdentifier\":\"responsibledisclosure@mattermost.com\",\"published\":\"2025-12-01T20:15:49.147\",\"lastModified\":\"2026-06-17T08:32:54.497\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Mattermost versions 11.0.x \u003c= 11.0.2, 10.12.x \u003c= 10.12.1, 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.\"}],\"affected\":[{\"source\":\"responsibledisclosure@mattermost.com\",\"affectedData\":[{\"vendor\":\"Mattermost\",\"product\":\"Mattermost\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"11.0.0\",\"lessThanOrEqual\":\"11.0.2\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"10.12.0\",\"lessThanOrEqual\":\"10.12.1\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"10.11.0\",\"lessThanOrEqual\":\"10.11.4\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"10.5.0\",\"lessThanOrEqual\":\"10.5.12\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"11.1.0\",\"status\":\"unaffected\"},{\"version\":\"11.0.3\",\"status\":\"unaffected\"},{\"version\":\"10.12.2\",\"status\":\"unaffected\"},{\"version\":\"10.11.5\",\"status\":\"unaffected\"},{\"version\":\"10.5.13\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"responsibledisclosure@mattermost.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-12-01T20:01:59.250891Z\",\"id\":\"CVE-2025-12756\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"responsibledisclosure@mattermost.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-863\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"10.5.0\",\"versionEndExcluding\":\"10.5.13\",\"matchCriteriaId\":\"91D99F7F-B4EE-447C-9B77-82DD64B1D83A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"10.11.0\",\"versionEndExcluding\":\"10.11.5\",\"matchCriteriaId\":\"A8368192-621C-4043-827E-DB4F6946AD92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"10.12.0\",\"versionEndExcluding\":\"10.12.2\",\"matchCriteriaId\":\"ED48D731-6490-4DD5-94D4-EE4555BB93ED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.0.0\",\"versionEndExcluding\":\"11.0.3\",\"matchCriteriaId\":\"3A288B87-76F2-415B-8462-3D185EB7A9B3\"}]}]}],\"references\":[{\"url\":\"https://mattermost.com/security-updates\",\"source\":\"responsibledisclosure@mattermost.com\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2025-12-11T20:02:52+00:00",
      "cve": "CVE-2025-12756",
      "id": "CVE-2025-12756",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-12756.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2025-12-12T00:50:20Z",
      "cve": "CVE-2025-12756",
      "id": "CVE-2025-12756",
      "initial_release_date": "2025-12-12T00:50:20Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-12756",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-12756.json",
      "version": "2"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-12756\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-12-01T20:01:59.250891Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-12-01T20:02:15.643Z\"}}], \"cna\": {\"title\": \"Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion\", \"source\": {\"defect\": [\"https://mattermost.atlassian.net/browse/MM-65965\"], \"advisory\": \"MMSA-2025-00530\", \"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"daynight\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Mattermost\", \"product\": \"Mattermost\", \"versions\": [{\"status\": \"affected\", \"version\": \"11.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"11.0.2\"}, {\"status\": \"affected\", \"version\": \"10.12.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"10.12.1\"}, {\"status\": \"affected\", \"version\": \"10.11.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"10.11.4\"}, {\"status\": \"affected\", \"version\": \"10.5.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"10.5.12\"}, {\"status\": \"unaffected\", \"version\": \"11.1.0\"}, {\"status\": \"unaffected\", \"version\": \"11.0.3\"}, {\"status\": \"unaffected\", \"version\": \"10.12.2\"}, {\"status\": \"unaffected\", \"version\": \"10.11.5\"}, {\"status\": \"unaffected\", \"version\": \"10.5.13\"}], \"defaultStatus\": \"unaffected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Update Mattermost to versions 11.1.0, 11.0.3, 10.12.2, 10.11.5, 10.5.13 or higher.\"}], \"references\": [{\"url\": \"https://mattermost.com/security-updates\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Mattermost versions 11.0.x \u003c= 11.0.2, 10.12.x \u003c= 10.12.1, 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863: Incorrect Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee\", \"shortName\": \"Mattermost\", \"dateUpdated\": \"2025-12-01T19:51:46.289Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-12756\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-01T20:02:24.869Z\", \"dateReserved\": \"2025-11-05T15:23:20.065Z\", \"assignerOrgId\": \"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee\", \"datePublished\": \"2025-12-01T19:51:46.289Z\", \"assignerShortName\": \"Mattermost\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

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.


Loading…