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CVE-2018-5135
WebExtensions can bypass normal restrictions in some circumstances and use "browser.tabs.executeScript" to inject scripts into contexts…
High7.5EPSS 1.5%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
WebExtensions can bypass normal restrictions in some circumstances and use "browser.tabs.executeScript" to inject scripts into contexts where this should not be allowed, such as pages from other WebExtensions or unprivileged "about:" pages. This vulnerability affects Firefox < 59.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.5% · top 26% 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 7.5.
Weakness
- WebExtension browserAction can inject scripts into unintended contexts
- CWE-862 (opens in a new tab)All about CWE-862 and its CVEs
Affected products
References (5)
- 103386 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1431371 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1040514 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- USN-3596-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://www.mozilla.org/security/advisories/mfsa2018-06/ (opens in a new tab)x_refsource_CONFIRMx_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-2018-5135)Record last updated .