CVE-2025-1935
published 2025-03-04CVE-2025-1935: A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR…
PriorityP417medium4.3CVSS 3.1
AVNACLPRNUIRSUCLINAN
EPSS
0.34%
26.2th percentile
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 136.0-1 (sid) | firefox 136.0-1 (sid) |
| debian | firefox-esr | < firefox 136.0-1 (sid) | firefox 136.0-1 (sid) |
| debian | thunderbird | < firefox 136.0-1 (sid) | firefox 136.0-1 (sid) |
| mozilla | firefox | < 128.8.0 | 128.8.0 |
| mozilla | firefox | < 136.0 | 136.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 136.0+build3-0ubuntu0.20.04.1 | 136.0+build3-0ubuntu0.20.04.1 |
| mozilla | thunderbird | < 128.8.0 | 128.8.0 |
| mozilla | thunderbird | >= 0 < 1:128.8.0esr-1~deb11u1 | 1:128.8.0esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:128.8.0esr-1~deb12u1 | 1:128.8.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:128.8.0esr-1 | 1:128.8.0esr-1 |
| mozilla | thunderbird | >= 0 < 1:128.8.0esr-1 | 1:128.8.0esr-1 |
| mozilla | thunderbird | >= 129.0 < 136.0 | 136.0 |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
osv7.5HIGH
vendor_ubuntu7.5HIGH
vendor_debian4.3MEDIUM
vendor_redhat4.3MEDIUM
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VulDB
Mozilla Firefox up to 135 URL Protocol clickjacking (Nessus ID 232196)
vuldb·2026-10-01·CVSS 4.3
CVE-2025-1935 [MEDIUM] Mozilla Firefox up to 135 URL Protocol clickjacking (Nessus ID 232196)
A vulnerability identified as problematic has been detected in Mozilla Firefox up to 135. This affects an unknown part of the component URL Protocol Handler. This manipulation causes clickjacking.
This vulnerability is handled as CVE-2025-1935. The attack can be initiated remotely. There is not any exploit available.
You should upgrade the affected component.
OSV
firefox vulnerabilities
osv·2025-03-06·CVSS 7.5
CVE-2025-1933 [HIGH] firefox vulnerabilities
firefox vulnerabilities
Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2025-1933,
CVE-2025-1934, CVE-2025-1935, CVE-2025-1936, CVE-2025-1937, CVE-2025-1942)
It was discovered that Firefox did not properly handle WebTransport
connection, leading to a use-after-free vulnerability. An attacker could
potentially exploit this issue to cause a denial of service.
(CVE-2025-1931)
Ivan Fratric discovered that Firefox did not properly handle XSLT sorting,
leading to a out-of-bounds access vulnerability. An attacker could
potentially exploit this issue to cause a denial of servic
GHSA
GHSA-c22c-4xww-2fqr: A web page could trick a user into setting that site as the default handler for a custom URL protocol
ghsa_unreviewed·2025-03-04
CVE-2025-1935 [MEDIUM] CWE-451 GHSA-c22c-4xww-2fqr: A web page could trick a user into setting that site as the default handler for a custom URL protocol
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136 and Firefox ESR < 128.8.
OSV
CVE-2025-1935: A web page could trick a user into setting that site as the default handler for a custom URL protocol
osv·2025-03-04·CVSS 4.3
CVE-2025-1935 [MEDIUM] CVE-2025-1935: A web page could trick a user into setting that site as the default handler for a custom URL protocol
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
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.
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2025-03-06·CVSS 7.5
CVE-2025-1932 [HIGH] Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Several security issues were fixed in Firefox.
Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2025-1933,
CVE-2025-1934, CVE-2025-1935, CVE-2025-1936, CVE-2025-1937, CVE-2025-1942)
It was discovered that Firefox did not properly handle WebTransport
connection, leading to a use-after-free vulnerability. An attacker could
potentially exploit this issue to cause a denial of service.
(CVE-2025-1931)
Ivan Fratric discovered that Firefox did not properly handle XSLT sorting,
leading to a out-of-bounds access vulnerability. An attacker
Red Hat
firefox: Clickjacking the registerProtocolHandler info-bar Reporter
vendor_redhat·2025-03-04·CVSS 4.3
CVE-2025-1935 [MEDIUM] CWE-1021 firefox: Clickjacking the registerProtocolHandler info-bar Reporter
firefox: Clickjacking the registerProtocolHandler info-bar Reporter
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: A web page could trick a user into setting that site as the default handler for a custom URL protocol.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: firefox-flatpak-container (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Ou
Debian
CVE-2025-1935: firefox - A web page could trick a user into setting that site as the default handler for ...
vendor_debian·2025·CVSS 4.3
CVE-2025-1935 [MEDIUM] CVE-2025-1935: firefox - A web page could trick a user into setting that site as the default handler for ...
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
Scope: local
sid: resolved (fixed in 136.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-17: CVE-2025-1935
vendor_mozilla·CVSS 4.3
CVE-2025-1935 [MEDIUM] Mozilla Foundation Security Advisory 2025-17: CVE-2025-1935
Mozilla Foundation Security Advisory 2025-17
CVE: CVE-2025-1935
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 136
Mozilla
Mozilla Foundation Security Advisory 2025-14: CVE-2025-1935
vendor_mozilla·CVSS 4.3
CVE-2025-1935 [MEDIUM] Mozilla Foundation Security Advisory 2025-14: CVE-2025-1935
Mozilla Foundation Security Advisory 2025-14
CVE: CVE-2025-1935
Product: Firefox
Impact: high
Fixed in: Firefox 136
Mozilla
Mozilla Foundation Security Advisory 2025-18: CVE-2025-1935
vendor_mozilla·CVSS 4.3
CVE-2025-1935 [MEDIUM] Mozilla Foundation Security Advisory 2025-18: CVE-2025-1935
Mozilla Foundation Security Advisory 2025-18
CVE: CVE-2025-1935
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 128.8
Mozilla
Mozilla Foundation Security Advisory 2025-16: CVE-2025-1935
vendor_mozilla·CVSS 4.3
CVE-2025-1935 [MEDIUM] Mozilla Foundation Security Advisory 2025-16: CVE-2025-1935
Mozilla Foundation Security Advisory 2025-16
CVE: CVE-2025-1935
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 128.8
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1866661https://www.mozilla.org/security/advisories/mfsa2025-14/https://www.mozilla.org/security/advisories/mfsa2025-16/https://www.mozilla.org/security/advisories/mfsa2025-17/https://www.mozilla.org/security/advisories/mfsa2025-18/https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html
2025-03-04
Published