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CVE-2018-12403
If a site is loaded over a HTTPS connection but loads a favicon resource over HTTP, the mixed content warning is not displayed to users.…
Medium5.3EPSS 2.1%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
If a site is loaded over a HTTPS connection but loads a favicon resource over HTTP, the mixed content warning is not displayed to users. This vulnerability affects Firefox < 63.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 2.1% · top 19% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- Mixed content warning is not displayed when HTTPS page loads a favicon over HTTP
Affected products
References (5)
- https://www.mozilla.org/security/advisories/mfsa2018-26/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1484753 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 105721 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- USN-3801-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 1041944 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-12403)Record last updated .