CVE-2021-46875 Cross-site scripting in eZ Platform Kernel

What is CVE-2021-46875?

CVE-2021-46875 is a medium-severity cross-site scripting vulnerability in n/a, published on 12 Mar 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

An issue was discovered in eZ Platform Ibexa Kernel before 1.3.1.1. An XSS attack can occur because JavaScript code can be uploaded in a .html or .js file.

Weakness: CWE-79

Which versions are affected by CVE-2021-46875?

8 open source packages ship an affected version, including ezsystems/ezplatform-kernel and ezsystems/ezpublish-kernel. It affects 1 product.

Products include Ibexa Ez Platform Kernel.

How do I fix CVE-2021-46875?

Upgrade ezsystems/ezplatform-kernel to a fixed version for your release line: 1.2.5.1 or 1.3.1.1.

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-2021-46875 being exploited?

There is no known exploitation of CVE-2021-46875 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2022-25337 Code injection in ezsystems/ezpublish-kernel Critical 9.8
• CVE-2021-46876 /user/sessions endpoint allows detecting valid accounts Medium 5.3
• CVE-2022-25336 Exposure of Resource to Wrong Sphere in ezsystems/ezplatform-kernel Medium 5.3

Sources

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

Also known as GHSA-mrvj-7q4f-5p42.