CVE-2023-34414

LOW
3.1
CVSS Score
Published: June 19, 2023 at 10:14 AM UTC
Updated: October 24, 2026 at 01:10 PM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
LOW3.1
Exploit prediction
EPSS 0.9%

Description

The error page for sites with invalid TLS certificates was missing the activation-delay Firefox uses to protect prompts and permission dialogs from attacks that exploit human response time delays. If a malicious page elicited user clicks in precise locations immediately before navigating to a site with a certificate error and made the renderer extremely busy at the same time, it could create a gap between when the error page was loaded and when the display actually refreshed. With the right timing the elicited clicks could land in that gap and activate the button that overrides the certificate error for that site. This vulnerability affects Firefox ESR < 102.12, Firefox < 114, and Thunderbird < 102.12.

Affected

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

v < 114.0
Affected range stops below 114, so it looks safe — our inference, not a vendor statement
Affected range stops below 114.0, so it looks safe — our inference, not a vendor statement
v < 102.12
Affected range stops below 102.12, so it looks safe — our inference, not a vendor statement
v < 102.12
Affected range stops below 102.12, 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:

CVSS

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

Quick Info

StatusMODIFIED
CWE
CWE-295

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