How severe is CVE-2025-1940?

CVE-2025-1940 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-1940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-1940?

CVE-2025-1940 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-1940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-1940 have an EU (EUVD) identifier?

Yes. CVE-2025-1940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7442.

When was CVE-2025-1940 published?

CVE-2025-1940 was published on 2025-03-04 and last updated on 2026-06-17.

CVE-2025-1940

CVE-2025-1940 is a high-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1021.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7442
Weakness: CWE-1021
Affected product: Mozilla Firefox
Published: 2025-03-04
Last modified: 2026-06-17

Description

A select option could partially obscure the confirmation prompt shown before launching external apps. This could be used to trick a user in to launching an external app unexpectedly. *This issue only affects Android versions of Firefox.*. This vulnerability was fixed in Firefox 136.

Frequently asked questions

What is CVE-2025-1940?: A select option could partially obscure the confirmation prompt shown before launching external apps. This could be used to trick a user in to launching an external app unexpectedly. *This issue only affects Android versions of Firefox.*. This vulnerability was fixed in Firefox 136.
How severe is CVE-2025-1940?: CVE-2025-1940 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-1940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-1940?: CVE-2025-1940 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-1940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-1940 have an EU (EUVD) identifier?: Yes. CVE-2025-1940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7442.
When was CVE-2025-1940 published?: CVE-2025-1940 was published on 2025-03-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

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