Is CVE-2025-1939 in the CISA KEV catalog?

No. CVE-2025-1939 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-1939?

CVE-2025-1939 has a CVSS v3 base score of 3.9 (LOW).

What is the EPSS score for CVE-2025-1939?

CVE-2025-1939 has an EPSS score of 0.17% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-1939?

Upgrade DeveloperEdition to 136.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2025-1939

LOW

3.9

CVSS v3

NVD

Description

Android apps can load web pages using the Custom Tabs feature. This feature supports a transition animation that could have been used to trick a user into granting sensitive permissions by hiding what the user was actually clicking. This vulnerability was fixed in Firefox 136.

CWE-359

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:136.0Fixed in:136.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:136.0Fixed in:136.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Issue Tracking1

bugzilla.mozilla.org

Product1

taptrap.click

Related Vulnerabilities

Other CWE-359 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-50719	High	7.5	84%	-	Fix
CVE-2022-0482	Critical	9.1	38%	-	Fix
CVE-2023-36052	High	8.6	22%	-	Fix
CVE-2021-22876	Medium	5.3	5.3%	-	Fix
CVE-2024-45591	Medium	5.3	3.4%	-	Fix
CVE-2022-24819	Medium	5.3	3.3%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-13.