CVE-2023-3740 Cross-site scripting in Chrome

What is CVE-2023-3740?

CVE-2023-3740 is a medium-severity cross-site scripting vulnerability in Google Chrome, published on 1 Aug 2023. 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

Insufficient validation of untrusted input in Themes in Google Chrome prior to 115.0.5790.98 allowed a remote attacker to potentially serve malicious content to a user via a crafted background URL. (Chromium security severity: Low)

Which versions are affected by CVE-2023-3740?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2023-3740?

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-2023-3740 being exploited?

There is no known exploitation of CVE-2023-3740 in the wild and no public exploit code.

Other vulnerabilities in Google Chrome

• CVE-2022-4135 Google Chromium GPU Heap Buffer Overflow Exploited Critical 9.6
• CVE-2020-16017 Google Chrome Use-After-Free Exploited Critical 9.6
• CVE-2020-16010 Google Chrome for Android UI Heap Buffer Overflow Exploited Critical 9.6
• CVE-2026-87491 Google Chromium V8 Out of Bounds Write Exploited High 8.8
• CVE-2026-85046 Google Chromium V8 Type Confusion Exploited High 8.8

All Google Chrome vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2023-3740, GHSA-jjw4-gf4w-43f9.