Critical severity · published Aug 5, 2021
CVE-2021-29971
If a user had granted a permission to a webpage and saved that grant, any webpage running on the same host - irrespective of scheme or port - would be granted that permission
9.8
CVSS
1%
EPSS
No
On KEV
Description
If a user had granted a permission to a webpage and saved that grant, any webpage running on the same host - irrespective of scheme or port - would be granted that permission. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 90.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 90.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-29971
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-29971
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1713638
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-28/
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