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CVE-2018-12397
A WebExtension can request access to local files without the warning prompt stating that the extension will "Access your data for all…
High7.1EPSS 0.37%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
A WebExtension can request access to local files without the warning prompt stating that the extension will "Access your data for all websites" being displayed to the user. This allows extensions to run content scripts in local pages without permission warnings when a local file is opened. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.1 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Weakness
- Missing warning prompt when WebExtension requests local file access
- CWE-200 (opens in a new tab)All about CWE-200 and its CVEs
Affected products
- affected unspecified – < 60.3
- affected unspecified – < 63
References (11)
- https://bugzilla.mozilla.org/show_bug.cgi?id=1487478 (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-4324 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://www.mozilla.org/security/advisories/mfsa2018-26/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- GLSA-201811-04 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://www.mozilla.org/security/advisories/mfsa2018-27/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2018:3005 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 105718 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2018:3006 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- USN-3801-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- [debian-lts-announce] 20181107 [SECURITY] [DLA 1571-1] firefox-esr security update (opens in a new tab)mailing-listx_refsource_MLISTx_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-2018-12397)Record last updated .