CVE-2023-34414

Name: CVE-2023-34414
Creator: NVD / NIST
Published: 2023-06-19T11:15:10.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.1/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2023-34414 is a low-severity vulnerability rated 3.1/10 on the CVSS scale. 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. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS Probability

0.90%

55.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 114.0
Mozilla	Firefox Esr	< 102.12
Mozilla	Thunderbird	< 102.12

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1695986Permissions Required
https://security.gentoo.org/glsa/202312-03
https://security.gentoo.org/glsa/202401-10
https://www.mozilla.org/security/advisories/mfsa2023-19/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-20/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-21/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1695986Permissions Required
https://security.gentoo.org/glsa/202312-03
https://security.gentoo.org/glsa/202401-10
https://www.mozilla.org/security/advisories/mfsa2023-19/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-20/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-21/Vendor Advisory

Timeline

Published: Jun 19, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-34414?

How severe is CVE-2023-34414?

CVE-2023-34414 has a CVSS score of 3.1/10 (LOW severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34414?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34414?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST