MEDIUM
firefox: Content Security Policy bypass through stylesheet injection in resource URIs
Published Feb 28, 2019
6.5
MEDIUMCVSS 3.0
EPSS 1.62%
Description
By using the reflected URL in some special resource URIs, such as chrome:, it is possible to inject stylesheets and bypass Content Security Policy (CSP). This vulnerability affects Firefox < 63.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<63
- Version
Configuration 2
OR
- 14.04
- 16.04
- 18.04
- 18.10
No data.
Red Hat Enterprise Linux 6
firefox
Will not fix
Red Hat Enterprise Linux 7
firefox
Will not fix
Red Hat Enterprise Linux 8
firefox
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | firefox | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | firefox | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | firefox | Will not fix | 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.
6.5 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.62% 0.01617
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01617
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.62% (0.01617) | 75.16th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.62% (0.01617) | 72.82th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.43% (0.00431) | 60.50th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.39% (0.00394) | 74.26th | v3 (v2023.03.01) |
| Feb 22, 2024 | 0.51% (0.00513) | 76.03th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.57% (0.00573) | 77.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.57% (0.00573) | 74.56th | 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 | 1.45% (0.01454) | 32.67th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.45% (0.01454) | 0.00th | v1 |
Weaknesses (1)
References (11)
- http://www.securityfocus.com/bid/105721 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041944 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-12398 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1460538 x_refsource_CONFIRMIssue TrackingPermissions RequiredVendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1488061 x_refsource_CONFIRMIssue TrackingPermissions RequiredVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1693621 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-12398
- https://usn.ubuntu.com/3801-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-12398
- https://www.mozilla.org/en-US/security/advisories/mfsa2018-26/#CVE-2018-12398
- https://www.mozilla.org/security/advisories/mfsa2018-26/ x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105721 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041944 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-12398 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1460538 | x_refsource_CONFIRMIssue TrackingPermissions RequiredVendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1488061 | x_refsource_CONFIRMIssue TrackingPermissions RequiredVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1693621 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-12398 | ||
| https://usn.ubuntu.com/3801-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-12398 | ||
| https://www.mozilla.org/en-US/security/advisories/mfsa2018-26/#CVE-2018-12398 | ||
| https://www.mozilla.org/security/advisories/mfsa2018-26/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mozilla
Published Feb 28, 2019
Updated Aug 5, 2024
Reserved Jun 14, 2018
Link CVE-2018-12398
CISA Vulnrichment
Updated n/a