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[email protected]CVE-2021-43540

HistoryDec 08, 2021 - 10:15 p.m.

CVE-2021-43540

2021-12-0822:15:09

[email protected]

web.nvd.nist.gov

110

cve-2021-43540

webextensions

serviceworkers

firefox

vulnerability

nvd

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

6.7 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

40.2%

JSON

WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95.

Affected configurations

Vulners

NVD

Node

mozillafirefoxRange≤95

VendorProductVersionCPE
mozillafirefox*cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mozilla	firefox	*	cpe:2.3:a:mozilla:firefox::::::::

CNA Affected

[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "95",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]