CVE-2022-46877 Cross-site scripting in Firefox

What is CVE-2022-46877?

CVE-2022-46877 is a medium-severity cross-site scripting vulnerability in Debian Debian Linux, published on 22 Dec 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

By confusing the browser, the fullscreen notification could have been delayed or suppressed, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox < 108.

Weakness: CWE-79

Which versions are affected by CVE-2022-46877?

It affects 2 products.

Products include Debian Debian Linux, Mozilla Firefox.

How do I fix CVE-2022-46877?

Upgrade to a fixed version.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2022-46877 being exploited?

There is no known exploitation of CVE-2022-46877 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-46877, GHSA-qhr9-wjgv-2r72, UBUNTU-CVE-2022-46877.