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CVE-2018-18495
WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions.…
Medium6.5EPSS 1.9%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. This vulnerability affects Firefox < 64.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.9% · top 20% of all CVEs (5 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
- WebExtension content scripts can be loaded in about: pages
- CWE-732 (opens in a new tab)All about CWE-732 and its CVEs
Affected products
References (4)
- https://www.mozilla.org/security/advisories/mfsa2018-29/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1427585 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-3844-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 106167 (opens in a new tab)vdb-entryx_refsource_BIDx_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-2018-18495)Record last updated .