CVE-2021-23955

MEDIUM
6.1
CVSS Score
Published: February 26, 2021 at 02:10 AM UTC
Updated: June 17, 2026 at 03:39 AM UTC
1 product affected across 1 vendorFirefox

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.7%

Description

The browser could have been confused into transferring a pointer lock state into another tab, which could have lead to clickjacking attacks. This vulnerability affects Firefox < 85.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 85
Affected range stops below 85, so it looks safe — our inference, not a vendor statement
Affected range stops below 85.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1684837
x_refsource_MISCRelease NotesVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-03/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1021

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