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MattermostCVE-2021-37863

HistoryDec 17, 2021 - 5:15 p.m.

CVE-2021-37863

2021-12-1717:15:12

CWE-20

Mattermost

web.nvd.nist.gov

mattermost

cve-2021-37863

validation

parameter

authenticated attackers

web application

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

CVSS3

5.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.3

Confidence

High

EPSS

0.001

Percentile

36.3%

JSON

Mattermost 6.0 and earlier fails to sufficiently validate parameters during post creation, which allows authenticated attackers to cause a client-side crash of the web application via a maliciously crafted post.

Affected configurations

Nvd

Node

mattermostmattermost_serverRange≤6.0

VendorProductVersionCPE
mattermostmattermost_server*cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mattermost	mattermost_server	*	cpe:2.3:a:mattermost:mattermost_server::::::::

CNA Affected

[
  {
    "product": "Mattermost ",
    "vendor": "Mattermost ",
    "versions": [
      {
        "lessThanOrEqual": "6.0",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

References

hackerone.com/reports/1253732

mattermost.com/security-updates/

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

CVSS3

5.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.3

Confidence

High

EPSS

0.001

Percentile

36.3%

JSON

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