Mozilla: WebExtension security permission checks bypassed by embedded experiments
Published Oct 18, 2018
9.8
CRITICALCVSS 3.0
EPSS 2.52%
Description
WebExtensions bundled with embedded experiments were not correctly checked for proper authorization. This allowed a malicious WebExtension to gain full browser permissions. This vulnerability affects Firefox ESR < 60.1 and Firefox < 61.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<61
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.1
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox | n/a |
| ||||||
| Mozilla | Firefox ESR | n/a |
|
Configuration 2
- 14.04
- 16.04
- 17.10
- 18.04
No data.
Red Hat Enterprise Linux 6
firefox
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
firefox
Not affected
Red Hat Enterprise Linux 7
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 7 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 7 | thunderbird | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.52% (0.02522) | 84.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.52% (0.02522) | 82.75th | v5 (v2026.06.15) |
| Nov 21, 2025 | 0.56% (0.00559) | 67.36th | v4 (v2025.03.14) |
| Nov 18, 2025 | 1.77% (0.01766) | 81.13th | v4 (v2025.03.14) |
| Oct 19, 2025 | 0.56% (0.00559) | 67.28th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.47% (0.02470) | 83.85th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.06% (0.07058) | 85.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.47% (0.02470) | 84.17th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.66% (0.00662) | 79.51th | v3 (v2023.03.01) |
| Apr 19, 2024 | 1.14% (0.01142) | 84.58th | v3 (v2023.03.01) |
| Mar 10, 2024 | 1.23% (0.01232) | 85.08th | v3 (v2023.03.01) |
| Oct 12, 2023 | 1.38% (0.01384) | 84.82th | v3 (v2023.03.01) |
| Sep 3, 2023 | 1.49% (0.01489) | 85.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.56% (0.01564) | 85.17th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.76% (0.01762) | 35.01th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.76% (0.01762) | 0.00th | v1 |
References (12)
- http://www.securityfocus.com/bid/104561 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041193 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-12369 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1454909 x_refsource_CONFIRMIssue TrackingPermissions RequiredVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1595034 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-12369
- https://security.gentoo.org/glsa/201810-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3705-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-12369
- https://www.mozilla.org/en-US/security/advisories/mfsa2018-16/#CVE-2018-12369
- https://www.mozilla.org/security/advisories/mfsa2018-15/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-16/ x_refsource_CONFIRMVendor Advisory
Change history (0)
No recorded changes yet.