CVE-2025-1935: Clickjacking the registerProtocolHandler info-bar
A web page could trick a user into setting that site as the default handler for a custom URL protocol.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 136 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 128.8 - Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 136 - Upgrade
Upgrade
debian/firefoxto a version that resolves this vulnerability.Fixed in 136.0.1-1 - Upgrade
Upgrade
debian/firefox-esrto a version that resolves this vulnerability.Fixed in 128.8.0esr-1~deb11u1Fixed in 128.8.0esr-1~deb12u1Fixed in 128.8.0esr-1 - Upgrade
Upgrade
debian/thunderbirdto a version that resolves this vulnerability.Fixed in 1:128.8.0esr-1~deb11u1Fixed in 1:128.8.0esr-1~deb12u1Fixed in 1:128.8.0esr-1 - Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 128.8
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2025-1935?
CVE-2025-1935 is considered a medium severity vulnerability due to its potential to manipulate user settings.
How do I fix CVE-2025-1935?
To resolve CVE-2025-1935, update your Firefox to version 136 or Firefox ESR to version 128.8.
Which versions of Firefox are affected by CVE-2025-1935?
CVE-2025-1935 affects Firefox versions prior to 136 and Firefox ESR versions prior to 128.8.
What type of attack does CVE-2025-1935 represent?
CVE-2025-1935 represents a social engineering attack that can change the default URL protocol handler.
Is CVE-2025-1935 restricted to specific operating systems?
CVE-2025-1935 affects the Firefox browser on multiple operating systems including Windows, macOS, and Linux.