CVE-2020-26958
CVSS V2 Medium 4.3
CVSS V3 Medium 6.1
Description
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Overview
- CVE ID
- CVE-2020-26958
- Assigner
- security@mozilla.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-12-09T01:15:13
- Last Modified Date
- 2020-12-10T18:03:45
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | 1 | OR | 83.0 | |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | 1 | OR | 78.5 | |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | 1 | OR | 78.5 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 6.1
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 2.7
References
| Reference URL | Reference Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2020-50/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-51/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-52/ | Vendor Advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1669355 | Issue Tracking Permissions Required Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-26958 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26958 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:30:43 | Added to TrackCVE | |||
| 2022-12-05 17:48:36 | 2020-12-09T01:15Z | 2020-12-09T01:15:13 | CVE Published Date | updated |
| 2022-12-05 17:48:36 | 2020-12-10T18:03:45 | CVE Modified Date | updated | |
| 2022-12-05 17:48:36 | Analyzed | Vulnerability Status | updated |