6.5
CVSSv3

CVE-2020-26967

Published: 09/12/2020 Updated: 10/12/2020
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8
VMScore: 383
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Vulnerability Summary

A security issue has been found in Firefox prior to 83.0 where, when listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code.

Vulnerability Trend

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mozilla firefox

Vendor Advisories

Mozilla Foundation Security Advisory 2020-50 Security Vulnerabilities fixed in Firefox 83 Announced November 17, 2020 Impact high Products Firefox Fixed in Firefox 83 ...
A security issue has been found in Firefox before 830 where, when listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page This would lead to internal errors and unexpected behavior in the Screenshots code ...