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NVD / CVE Program· CNA mozilla

CVE-2025-6428: Firefox for Android opened URLs specified in a link querystring parameter

Noroxi assessment

Priority: Monitor (action score 17/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: MozillaFirefox (openSUSE:Leap 15.6) 140.1.0-150200.152.193.1; MozillaFirefox-branding-SLE (openSUSE:Leap 15.6) 140-150200.9.21.1; firefox-esr (openSUSE:Tumbleweed) 140.1.0-1.1.

Low priority for now. Upgrade to MozillaFirefox (openSUSE:Leap 15.6) 140.1.0-150200.152.193.1; MozillaFirefox-branding-SLE (openSUSE:Leap 15.6) 140-150200.9.21.1; firefox-esr (openSUSE:Tumbleweed) 140.1.0-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

When a URL was provided in a link querystring parameter, Firefox for Android would follow that URL instead of the correct URL, potentially leading to phishing attacks. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140.

MediumCVSS 4.3 · v3.1—No exploit Fix available
Published
Jun 24, 2025
Updated
Sep 30, 2026
EPSS
0.2% · 12th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-6428

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mozillafirefox
googleandroid

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • mozilla firefoxbefore 140.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.

  • Mozilla Firefox

    • 140 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
openSUSE:Leap 15.6MozillaFirefoxbefore 140.1.0-150200.152.193.1140.1.0-150200.152.193.1
openSUSE:Leap 15.6MozillaFirefox-branding-SLEbefore 140-150200.9.21.1140-150200.9.21.1
openSUSE:Tumbleweedfirefox-esrbefore 140.1.0-1.1140.1.0-1.1
openSUSE:TumbleweedMozillaFirefoxbefore 140.0.2-1.1140.0.2-1.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSpipewirebefore 0.3.24-150300.4.8.10.3.24-150300.4.8.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSxdg-desktop-portalbefore 1.8.0-150200.5.8.11.8.0-150200.5.8.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSpipewirebefore 0.3.49-150400.3.7.10.3.49-150400.3.7.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSxdg-desktop-portalbefore 1.10.1-150400.3.8.11.10.1-150400.3.8.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSpipewirebefore 0.3.64-150500.3.7.20.3.64-150500.3.7.2
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSxdg-desktop-portalbefore 1.16.0-150500.3.8.11.16.0-150500.3.8.1
SUSE:Linux Enterprise Module for Desktop Applications 15 SP6MozillaFirefoxbefore 140.1.0-150200.152.193.1140.1.0-150200.152.193.1
SUSE:Linux Enterprise Module for Desktop Applications 15 SP6MozillaFirefox-branding-SLEbefore 140-150200.9.21.1140-150200.9.21.1
SUSE:Linux Enterprise Module for Package Hub 15 SP6pipewirebefore 0.3.6-150200.3.11.10.3.6-150200.3.11.1
SUSE:Linux Enterprise Server 12 SP5-LTSSMozillaFirefoxbefore 140.0-112.270.2140.0-112.270.2
SUSE:Linux Enterprise Server 12 SP5-LTSSMozillaFirefox-branding-SLEbefore 140-35.19.5140-35.19.5

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV
    87Now
  • CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV
    86Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-6426Jun 24, 2025 · No warning when opening executable terminal files on macOS
    35Monitor
  • ← EarlierCVE-2025-6427Jun 24, 2025 · connect-src Content Security Policy restriction could be bypassed
    36Monitor
  • Later →CVE-2025-6429Jun 24, 2025 · Incorrect parsing of URLs could have allowed embedding of youtube.com
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
opensuse:firefox-esr140.1.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:MozillaFirefox140.1.0-150200.152.193.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:MozillaFirefox-branding-SLE140-150200.9.21.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:MozillaFirefox140.0-112.270.2 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:MozillaFirefox140.1.0-150200.152.193.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP6Package registry (OSV)
suse:MozillaFirefox-branding-SLE140-150200.9.21.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP6Package registry (OSV)
suse:MozillaFirefox-branding-SLE140-35.19.5 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:pipewire0.3.6-150200.3.11.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)
suse:xdg-desktop-portal1.8.0-150200.5.8.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-5503156 days apartPasskey phishing within Bluetooth range
    39Monitor
  • CVE-2025-5414556 days apartScanning a malicious URL utilizing Firefox's open-text scheme with the QR code scanner could load arbitrary websites
    36Monitor
  • CVE-2024-4773406 days apartWhen a network error occurred during page load, the prior content could have remained in view with a blank URL bar.
    30Monitor
  • CVE-2024-8897280 days apartUnder certain conditions, an attacker with the ability to redirect users to a malicious site via an open redirect on a trusted site, may be
    26Monitor
  • CVE-2024-8386294 days apartIf a site had been granted the permission to open popup windows, it could cause Select elements to appear on top of another site to perform
    24Monitor
  • CVE-2025-0244168 days apartAddress bar spoofing using an invalid protocol scheme on Firefox for Android
    23Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records