Vulnerability details
CVE-2025-3029
URL Bar Spoofing via non-BMP Unicode characters
CVSS 3.1
7.3High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.3High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
6- https://bugzilla.mozilla.org/show_bug.cgi?id=1952213
- 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/
- https://lists.debian.org/debian-lts-announce/2025/04/msg00005.html
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Details
- Published
- 2025-04-01
- Last updated
- 2026-04-13
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.35%
Probability of exploitation in 30 days
29.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-290Authentication Bypass by Spoofing