Incorrect authorization in Mozilla Firefox
Priority LOW 32CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 16 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-863.
Summary
By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.
Why it matters now
EPSS 0.01389 72nd percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 80Thunderbird (Mozilla): 78.2, 68.12+2 more productsRed Hat: 10 advisoriesRed Hat: 16 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mozilla | Firefox | before 80 | 80 | Patch available | CNA |
| Mozilla | Thunderbird | before 78.2; before 68.12 | 78.2, 68.12 | Patch available | CNA |
| Mozilla | Firefox ESR | before 68.12; before 78.2 | 68.12, 78.2 | Patch available | CNA |
| Mozilla | Firefox for Android | before 80 | 80 | Patch available | CNA |
- Firefox VendorMozilla Affected before 80 Fixed in 80 Patch available CNA
- Thunderbird VendorMozilla Affected before 78.2; before 68.12 Fixed in 78.2, 68.12 Patch available CNA
- Firefox ESR VendorMozilla Affected before 68.12; before 78.2 Fixed in 68.12, 78.2 Patch available CNA
- Firefox for Android VendorMozilla Affected before 80 Fixed in 80 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:-:*:* | before 80.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | 78.0 to before 78.2 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 68.12 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:*:*:* | before 80.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 68.12; 78.0 to before 78.2 | Vulnerable | Mozilla |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:-:*:* Versions before 80.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions 78.0 to before 78.2 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 68.12 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:*:*:* Versions before 80.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 68.12; 78.0 to before 78.2 Vulnerable ·Mozilla
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 80
- Fix · CNA Thunderbird (Mozilla) Fixed in 78.2, 68.12
- Fix · CNA Firefox ESR (Mozilla) Fixed in 68.12, 78.2
- Fix · CNA Firefox for Android (Mozilla) Fixed in 80
Red Hat 10 advisories
- RHSA-2020:3643 Released 2020-09-08 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-68.12.0-1.el6_10
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-68.12.0-1.el6_10
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-68.12.0-1.el6_10
- RHSA-2020:3634 Released 2020-09-07 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-68.12.0-1.el8_2
- RHSA-2020:3632 Released 2020-09-07 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v. 8.1) thunderbird-68.12.0-1.el8_1
Show 7 more Red Hat advisories
- RHSA-2020:3633 Released 2020-09-07 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.0) thunderbird-68.12.0-1.el8_0
- RHSA-2020:3631 Released 2020-09-07 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-68.12.0-1.el7_8
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-68.12.0-1.el7_8
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-68.12.0-1.el7_8
- RHSA-2020:3559 Released 2020-08-26 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v. 8.1) firefox-78.2.0-3.el8_1
- RHSA-2020:3557 Released 2020-08-26 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-78.2.0-2.el8_2
- RHSA-2020:3556 Released 2020-08-26 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-68.12.0-1.el7_8
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-68.12.0-1.el7_8
- Red Hat Enterprise Linux Server (v. 7) firefox-68.12.0-1.el7_8
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-68.12.0-1.el7_8
- Red Hat Enterprise Linux Workstation (v. 7) firefox-68.12.0-1.el7_8
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-68.12.0-1.el7_8
- RHSA-2020:3558 Released 2020-08-26 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux Desktop (v. 6) firefox-68.12.0-1.el6_10
- Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-68.12.0-1.el6_10
- Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-68.12.0-1.el6_10
- Red Hat Enterprise Linux Server (v. 6) firefox-68.12.0-1.el6_10
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-68.12.0-1.el6_10
- Red Hat Enterprise Linux Workstation (v. 6) firefox-68.12.0-1.el6_10
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-68.12.0-1.el6_10
- RHSA-2020:3555 Released 2020-08-26 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.0) firefox-78.2.0-3.el8_0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Mozilla Firefox 80
7 records Highest priority Priority MEDIUM 3 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2020-12338 Uncontrolled search path in Mozilla FirefoxPriority MEDIUM 43
- TI-2020-12342 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 41
- TI-2020-12345 Race condition in Mozilla FirefoxPriority MEDIUM 40
- Release ·
Mozilla Firefox for Android 80
5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2020-12345 Race condition in Mozilla FirefoxPriority MEDIUM 40
- TI-2020-12341 Information disclosure through error messages in Mozilla FirefoxPriority LOW 31
- TI-2020-12343 A lock was missing when accessing a data structure and importing certificate information…Priority LOW 21
Show 1 more group
- Release ·
Mozilla Firefox ESR, Thunderbird 68.12, 78.2
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2020-12338 Uncontrolled search path in Mozilla FirefoxPriority MEDIUM 43
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:3557, RHSA-2020:3634 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.0) | Fixed | RHSA-2020:3555, RHSA-2020:3633 |
| Red Hat Enterprise Linux AppStream EUS (v. 8.1) | Fixed | RHSA-2020:3559, RHSA-2020:3632 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2020:3556, RHSA-2020:3631 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2020:3556 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2020:3558, RHSA-2020:3643 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2020:3558 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2020:3558 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2020:3558 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:3556 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2020:3558, RHSA-2020:3643 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2020:3556, RHSA-2020:3631 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2020:3558, RHSA-2020:3643 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:3556, RHSA-2020:3631 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2020:3558 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2020:3556 |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15664
- 2026-10-03 Alias added: GHSA-f4gc-pc7j-rfxr
References
Advisory 7
- https://www.mozilla.org/security/advisories/mfsa2020-39/
- https://www.mozilla.org/security/advisories/mfsa2020-41/
- https://www.mozilla.org/security/advisories/mfsa2020-36/
- https://www.mozilla.org/security/advisories/mfsa2020-38/
- https://www.mozilla.org/security/advisories/mfsa2020-40/
- https://www.mozilla.org/security/advisories/mfsa2020-37/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1658214
More Mozilla Firefox vulnerabilities
- TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
- TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
- TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
- TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
- TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
- TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2020-15664 · CVE Program
- CVE-2020-15664 · NVD
- FIRST EPSS
- GHSA-f4gc-pc7j-rfxr · GitHub Advisory Database · CC BY 4.0
- CVE-2020-15664 · Red Hat security data · CC BY 4.0
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