The combined, single character, version of the letter 'i' with any of the potential accents in unicode, such as acute or grave, can be spoofed in the addressbar by the dotless version of 'i' followed by the same accent as a second character with most font sets
Published Jun 11, 2018
5.3
MEDIUMCVSS 3.0
EPSS 1.51%
Description
The combined, single character, version of the letter 'i' with any of the potential accents in unicode, such as acute or grave, can be spoofed in the addressbar by the dotless version of 'i' followed by the same accent as a second character with most font sets. This allows for domain spoofing attacks because these combined domain names do not display as punycode. This vulnerability affects Firefox < 57.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<57
- Version
No data.
No Red Hat product state for this CVE.
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:N/I:L/A:N
AV:N/AC:L/Au:N/C:N/I:P/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 v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.51% (0.01514) | 73.56th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.51% (0.01514) | 73.35th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.26% (0.00255) | 65.76th | v3 (v2023.03.01) |
| May 9, 2024 | 0.26% (0.00255) | 65.22th | v3 (v2023.03.01) |
| Nov 2, 2023 | 0.26% (0.00255) | 63.21th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.32% (0.00324) | 66.98th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00359) | 67.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (4)
- http://www.securityfocus.com/bid/101832 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039803 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1408782 x_refsource_CONFIRMIssue TrackingPermissions Required
- https://www.mozilla.org/security/advisories/mfsa2017-24/ x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/101832 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039803 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1408782 | x_refsource_CONFIRMIssue TrackingPermissions Required | |
| https://www.mozilla.org/security/advisories/mfsa2017-24/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.