Mozilla: WebExtension host permission bypass through filterReponseData
Published Jun 11, 2018
7.5
HIGHCVSS 3.0
EPSS 2.40%
Description
WebExtensions can use request redirection and a "filterReponseData" filter to bypass host permission settings to redirect network traffic and access content from a host for which they do not have explicit user permission. This vulnerability affects Firefox < 60.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<60
- Version
Configuration 1
- 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:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
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 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.40% (0.02402) | 83.44th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.43% (0.02433) | 82.07th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.33% (0.01329) | 78.14th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.10% (0.04098) | 80.65th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.35% (0.01355) | 78.81th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.21% (0.00212) | 60.15th | v3 (v2023.03.01) |
| Dec 12, 2023 | 0.21% (0.00212) | 59.00th | v3 (v2023.03.01) |
| Nov 2, 2023 | 0.29% (0.00290) | 65.64th | v3 (v2023.03.01) |
| Jul 10, 2023 | 0.42% (0.00416) | 70.55th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.42% (0.00422) | 70.75th | v3 (v2023.03.01) |
| Jun 5, 2023 | 0.64% (0.00639) | 76.19th | v3 (v2023.03.01) |
| May 8, 2023 | 0.71% (0.00713) | 77.58th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00472) | 71.82th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.32% (0.01324) | 31.25th | v1 |
| Jan 6, 2022 | 1.32% (0.01324) | 30.61th | v1 |
| Sep 1, 2021 | 1.32% (0.01324) | 69.73th | v1 |
| Apr 14, 2021 | 1.32% (0.01324) | 0.00th | v1 |
References (10)
- http://www.securityfocus.com/bid/104139 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040896 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-5166 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1437325 x_refsource_CONFIRMIssue TrackingPermissions RequiredVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1576267 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-5166
- https://usn.ubuntu.com/3645-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-5166
- https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5166
- https://www.mozilla.org/security/advisories/mfsa2018-11/ x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/104139 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040896 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-5166 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1437325 | x_refsource_CONFIRMIssue TrackingPermissions RequiredVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1576267 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-5166 | ||
| https://usn.ubuntu.com/3645-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-5166 | ||
| https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5166 | ||
| https://www.mozilla.org/security/advisories/mfsa2018-11/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.