Mozilla: WebExtensions can access the mozAddonManager API and use it to gain elevated privileges (MFSA 2016-89)
Published Jun 11, 2018
9.8
CRITICALCVSS 3.0
EPSS 2.13%
Description
An issue where WebExtensions can use the mozAddonManager API to elevate privilege due to privileged pages being allowed in the permissions list. This allows a malicious extension to then install additional extensions without explicit user permission. This vulnerability affects Firefox < 50.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<50
- Version
No data.
Red Hat Enterprise Linux 5
firefox
Not affected
Red Hat Enterprise Linux 5
thunderbird
Not affected
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 5 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 5 | thunderbird | Not affected | n/a |
| 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
Red Hat statement
This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.
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 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.13% (0.02130) | 81.29th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.16% (0.02158) | 79.75th | v5 (v2026.06.15) |
| Jun 29, 2025 | 3.30% (0.03303) | 86.68th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.48% (0.04478) | 88.06th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.19% (0.12188) | 89.69th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.56% (0.04561) | 88.46th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.54% (0.00541) | 78.07th | v3 (v2023.03.01) |
| Feb 27, 2024 | 0.54% (0.00541) | 76.70th | v3 (v2023.03.01) |
| Dec 12, 2023 | 0.54% (0.00541) | 74.70th | v3 (v2023.03.01) |
| Nov 2, 2023 | 0.58% (0.00585) | 75.78th | v3 (v2023.03.01) |
| Sep 20, 2023 | 0.66% (0.00657) | 77.06th | v3 (v2023.03.01) |
| Jul 10, 2023 | 0.93% (0.00931) | 80.84th | v3 (v2023.03.01) |
| Jun 5, 2023 | 0.94% (0.00937) | 80.82th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.96% (0.00956) | 80.86th | 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) |
References (9)
- http://www.securityfocus.com/bid/94337 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037298 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-9075 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1295324 x_refsource_CONFIRMIssue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1395101 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-9075
- https://www.cve.org/CVERecord?id=CVE-2016-9075
- https://www.mozilla.org/security/advisories/mfsa2016-89/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/announce/2016/mfsa2016-89.html
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/94337 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1037298 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2016-9075 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1295324 | x_refsource_CONFIRMIssue TrackingVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1395101 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-9075 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-9075 | ||
| https://www.mozilla.org/security/advisories/mfsa2016-89/ | x_refsource_CONFIRMVendor Advisory | |
| https://www.mozilla.org/security/announce/2016/mfsa2016-89.html |
Change history (0)
No recorded changes yet.