CVE-2020-26967 — Mozilla Firefox vulnerability
7 documents6 sources
Severity
6.5MEDIUMNVD
EPSS
0.3%
top 48.16%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedDec 9
Latest updateMay 24
Description
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. This vulnerability affects Firefox < 83.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NExploitability: 2.8 | Impact: 3.6
Affected Packages5 packages
🔴Vulnerability Details
2GHSA▶
GHSA-g4xj-2594-cc4j: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other↗2022-05-24
OSV▶
CVE-2020-26967: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other↗2020-11-17