Mozilla: WebExtensions information leak through webRequest API
Published Jun 11, 2018
6.5
MEDIUMCVSS 3.0
EPSS 1.63%
Description
WebExtensions with the appropriate permissions can attach content scripts to Mozilla sites such as accounts.firefox.com and listen to network traffic to the site through the "webRequest" API. For example, this allows for the interception of username and an encrypted password during login to Firefox Accounts. This issue does not expose synchronization traffic directly and is limited to the process of user login to the website and the data displayed to the user once logged in. This vulnerability affects Firefox < 60.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<60
- Version
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:R/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AV:N/AC:M/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 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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.63% (0.01630) | 75.36th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.65% (0.01651) | 73.38th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.66% (0.00658) | 69.35th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.43% (0.00425) | 75.13th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.43% (0.00425) | 73.63th | v3 (v2023.03.01) |
| Nov 2, 2023 | 0.43% (0.00425) | 71.51th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.61% (0.00607) | 75.90th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.54% (0.00537) | 73.66th | 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 | 1.54% (0.01543) | 33.48th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.54% (0.01543) | 0.00th | v1 |
References (11)
- 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-2018-5152 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1415644 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1427289 x_refsource_CONFIRMIssue TrackingPermissions RequiredThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1576252 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-5152
- https://usn.ubuntu.com/3645-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-5152
- https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5152
- 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-2018-5152 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1415644 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1427289 | x_refsource_CONFIRMIssue TrackingPermissions RequiredThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1576252 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-5152 | ||
| https://usn.ubuntu.com/3645-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-5152 | ||
| https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5152 | ||
| https://www.mozilla.org/security/advisories/mfsa2018-11/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.