CVE-2023-5722 Information disclosure in Firefox

What is CVE-2023-5722?

CVE-2023-5722 is a medium-severity vulnerability in Mozilla Firefox, published on 24 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Using iterative requests an attacker was able to learn the size of an opaque response, as well as the contents of a server-supplied Vary header. This vulnerability affects Firefox < 119.

Weakness: CWE-203

Which versions are affected by CVE-2023-5722?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2023-5722?

Upgrade to a fixed version.

Is CVE-2023-5722 being exploited?

There is no known exploitation of CVE-2023-5722 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

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

Also known as GHSA-3cw5-74j7-6q4r, UBUNTU-CVE-2023-5722.