CVE-2025-3029
published 2025-04-01CVE-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…
PriorityP338high7.3CVSS 3.1
AVNACLPRNUINSUCLILAL
EPSS
0.35%
27.2th percentile
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.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 137.0-1 (sid) | firefox 137.0-1 (sid) |
| debian | firefox-esr | < firefox 137.0-1 (sid) | firefox 137.0-1 (sid) |
| debian | thunderbird | < firefox 137.0-1 (sid) | firefox 137.0-1 (sid) |
| mozilla | firefox | < 128.9.0 | 128.9.0 |
| mozilla | firefox | < 137.0 | 137.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 128.9.0 | 128.9.0 |
| mozilla | thunderbird | >= 0 < 1:128.9.0esr-1~deb11u1 | 1:128.9.0esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:128.9.0esr-1~deb12u1 | 1:128.9.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:128.9.0esr-1 | 1:128.9.0esr-1 |
| mozilla | thunderbird | >= 0 < 1:128.9.0esr-1 | 1:128.9.0esr-1 |
| mozilla | thunderbird | >= 129.0 < 137.0 | 137.0 |
CVSS provenance
nvdv3.17.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
osv7.3HIGH
vendor_debian7.3HIGH
vendor_redhat7.3HIGH
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VulDB
Mozilla Firefox up to 136 URL ui layer (Nessus ID 233651)
vuldb·2026-10-06·CVSS 7.3
CVE-2025-3029 [HIGH] Mozilla Firefox up to 136 URL ui layer (Nessus ID 233651)
A vulnerability, which was classified as problematic, has been found in Mozilla Firefox up to 136. This affects an unknown function of the component URL Handler. This manipulation causes improper restriction of rendered ui layers.
This vulnerability is registered as CVE-2025-3029. Remote exploitation of the attack is possible. No exploit is available.
It is advisable to upgrade the affected component.
VulDB
Mozilla Thunderbird up to 136 URL ui layer (Nessus ID 233651)
vuldb·2026-10-06·CVSS 7.3
CVE-2025-3029 [HIGH] Mozilla Thunderbird up to 136 URL ui layer (Nessus ID 233651)
A vulnerability, which was classified as problematic, was found in Mozilla Thunderbird up to 136. This impacts an unknown function of the component URL Handler. Such manipulation leads to improper restriction of rendered ui layers.
This vulnerability is documented as CVE-2025-3029. The attack can be executed remotely. There is not any exploit available.
You should upgrade the affected component.
GHSA
GHSA-799g-3g44-3g9m: A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack
ghsa_unreviewed·2025-04-01
CVE-2025-3029 [HIGH] CWE-290 GHSA-799g-3g44-3g9m: A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack
A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox < 137, Firefox ESR < 128.9, Thunderbird < 137, and Thunderbird ESR < 128.9.
OSV
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
osv·2025-04-01·CVSS 7.3
CVE-2025-3029 [HIGH] 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
A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox < 137, Firefox ESR < 128.9, Thunderbird < 137, and Thunderbird < 128.9.
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2025-07-22
CVE-2025-4083 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass security restrictions, cross-site
tracing, or execute arbitrary code.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart thunderbird to
make all the necessary changes.
Red Hat
firefox: thunderbird: URL Bar Spoofing via non-BMP Unicode characters
vendor_redhat·2025-04-01·CVSS 7.3
CVE-2025-3029 [HIGH] CWE-346 firefox: thunderbird: URL Bar Spoofing via non-BMP Unicode characters
firefox: thunderbird: URL Bar Spoofing via non-BMP Unicode characters
A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox < 137, Firefox ESR < 128.9, Thunderbird < 137, and Thunderbird < 128.9.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox-flatpak-container (Red Hat Enterprise Linux 10) - Affected
Package: thunderbird-flatpak
Debian
CVE-2025-3029: firefox - A crafted URL containing specific Unicode characters could have hidden the true ...
vendor_debian·2025·CVSS 7.3
CVE-2025-3029 [HIGH] CVE-2025-3029: firefox - A crafted URL containing specific Unicode characters could have hidden the true ...
A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox < 137, Firefox ESR < 128.9, Thunderbird < 137, and Thunderbird < 128.9.
Scope: local
sid: resolved (fixed in 137.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-22: CVE-2025-3029
vendor_mozilla·CVSS 7.3
CVE-2025-3029 [HIGH] Mozilla Foundation Security Advisory 2025-22: CVE-2025-3029
Mozilla Foundation Security Advisory 2025-22
CVE: CVE-2025-3029
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 128.9
Mozilla
Mozilla Foundation Security Advisory 2025-20: CVE-2025-3029
vendor_mozilla·CVSS 7.3
CVE-2025-3029 [HIGH] Mozilla Foundation Security Advisory 2025-20: CVE-2025-3029
Mozilla Foundation Security Advisory 2025-20
CVE: CVE-2025-3029
Product: Firefox
Impact: high
Fixed in: Firefox 137
Mozilla
Mozilla Foundation Security Advisory 2025-24: CVE-2025-3029
vendor_mozilla·CVSS 7.3
CVE-2025-3029 [HIGH] Mozilla Foundation Security Advisory 2025-24: CVE-2025-3029
Mozilla Foundation Security Advisory 2025-24
CVE: CVE-2025-3029
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 128.9
Mozilla
Mozilla Foundation Security Advisory 2025-23: CVE-2025-3029
vendor_mozilla·CVSS 7.3
CVE-2025-3029 [HIGH] Mozilla Foundation Security Advisory 2025-23: CVE-2025-3029
Mozilla Foundation Security Advisory 2025-23
CVE: CVE-2025-3029
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 137
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1952213https://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
2025-04-01
Published