CVE-2023-2808

2023-05-2910:15:10

CWE-20

[email protected]

web.nvd.nist.gov

mattermost

utf

confusable characters

hyperlink

link preview

security vulnerability

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

5.2 Medium

AI Score

Confidence

High

0.0005 Low

EPSS

Percentile

18.4%

JSON

Mattermost fails to normalize UTF confusable characters when determining if a preview should be generated for a hyperlink, allowing an attacker to trigger link preview on a disallowed domain using a specially crafted link.

Affected configurations

NVD

Node

mattermostmattermostRange5.34.0–7.1.9

mattermostmattermostRange7.2.0–7.8.4

mattermostmattermostRange7.9.0–7.9.3

CPENameOperatorVersion
mattermost:mattermostmattermostlt7.1.9
mattermost:mattermostmattermostlt7.8.4
mattermost:mattermostmattermostlt7.9.3

CPE	Name	Operator	Version
mattermost:mattermost	mattermost	lt	7.1.9
mattermost:mattermost	mattermost	lt	7.8.4
mattermost:mattermost	mattermost	lt	7.9.3

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThan": "7.1.9",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "7.8.4",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "7.9.3",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "7.1.9"
      },
      {
        "status": "unaffected",
        "version": "7.8.4"
      },
      {
        "status": "unaffected",
        "version": "7.9.3"
      },
      {
        "status": "unaffected",
        "version": "7.10"
      }
    ]
  }
]