What is the severity of CVE-2025-3033?

CVE-2025-3033 has been classified as a moderate severity vulnerability affecting Firefox on Windows.

How do I fix CVE-2025-3033?

To mitigate CVE-2025-3033, users should update Firefox or Thunderbird to version 137 or later.

What systems are affected by CVE-2025-3033?

CVE-2025-3033 specifically affects the Firefox and Thunderbird applications on Windows operating systems.

What type of vulnerability is CVE-2025-3033?

CVE-2025-3033 is a file upload vulnerability that occurs when a malicious Windows .url shortcut is selected.

Can I be attacked by CVE-2025-3033 if I use a different operating system?

No, CVE-2025-3033 only affects Windows systems; other operating systems are not at risk from this vulnerability.

Vulnerability/
CVE-2025-3033

high

7.7

CWE

EPSS

0.011%

1/4/2025

CVE-2025-3033

First published: Tue Apr 01 2025(Updated: )

After selecting a malicious Windows .url shortcut from the local filesystem, an unexpected file could be uploaded. This bug only affects Firefox on Windows. Other operating systems are unaffected.

Credit: security@mozilla.org

Affected Software	Affected Version	How to fix
Firefox	<137	137
Thunderbird	<137	137

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Frequently Asked Questions

What is the severity of CVE-2025-3033?
CVE-2025-3033 has been classified as a moderate severity vulnerability affecting Firefox on Windows.
How do I fix CVE-2025-3033?
To mitigate CVE-2025-3033, users should update Firefox or Thunderbird to version 137 or later.
What systems are affected by CVE-2025-3033?
CVE-2025-3033 specifically affects the Firefox and Thunderbird applications on Windows operating systems.
What type of vulnerability is CVE-2025-3033?
CVE-2025-3033 is a file upload vulnerability that occurs when a malicious Windows .url shortcut is selected.
Can I be attacked by CVE-2025-3033 if I use a different operating system?
No, CVE-2025-3033 only affects Windows systems; other operating systems are not at risk from this vulnerability.

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agent/type
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agent/first-publish-date
collector/mozilla-advisory
source/Mozilla
agent/software-canonical-lookup
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agent/severity
agent/event
collector/nvd-api
source/NVD
agent/last-modified-date
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source/FIRST
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agent/epss
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vendor/mozilla
canonical/firefox
canonical/thunderbird

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Frequently Asked Questions

What is the severity of CVE-2025-3033?
CVE-2025-3033 has been classified as a moderate severity vulnerability affecting Firefox on Windows.
How do I fix CVE-2025-3033?
To mitigate CVE-2025-3033, users should update Firefox or Thunderbird to version 137 or later.
What systems are affected by CVE-2025-3033?
CVE-2025-3033 specifically affects the Firefox and Thunderbird applications on Windows operating systems.
What type of vulnerability is CVE-2025-3033?
CVE-2025-3033 is a file upload vulnerability that occurs when a malicious Windows .url shortcut is selected.
Can I be attacked by CVE-2025-3033 if I use a different operating system?
No, CVE-2025-3033 only affects Windows systems; other operating systems are not at risk from this vulnerability.