CVE-2025-3029: firefox — Fix

Description

A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability was fixed in Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

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CVSS v3.1 Score

7.3

HIGH

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

Weakness Type (CWE)

CWE-290 CWE-290

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 128.9.0
mozilla	firefox	< 137.0
mozilla	thunderbird	< 128.9.0
mozilla	thunderbird	129.0 — 137.0

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2025-20/ https://www.mozilla.org/security/advisories/mfsa2025-22/ https://www.mozilla.org/security/advisories/mfsa2025-23/ https://www.mozilla.org/security/advisories/mfsa2025-24/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1952213 https://lists.debian.org/debian-lts-announce/2025/04/msg00005.html

Frequently Asked Questions

What is CVE-2025-3029? +

A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability was fixed in Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2025-3029? +

CVE-2025-3029 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-3029? +

CVE-2025-3029 affects products from mozilla, specifically: firefox, thunderbird. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-3029? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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