CVE-2022-23647 Cross-site Scripting in Prism

What is CVE-2022-23647?

CVE-2022-23647 is a high-severity cross-site scripting vulnerability in PrismJS prism, published on 18 Feb 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

Prism is a syntax highlighting library. Starting with version 1.14.0 and prior to version 1.27.0, Prism's command line plugin can be used by attackers to achieve a cross-site scripting attack. The command line plugin did not properly escape its output, leading to the input text being inserted into the DOM as HTML code. Server-side usage of Prism is not impacted. Websites that do not use the Command Line plugin are also not impacted. This bug has been fixed in v1.27.0. As a workaround, do not use the command line plugin on untrusted inputs, or sanitize all code blocks (remove all HTML code text) from all code blocks that use the command line plugin.

Weakness: CWE-79

Which versions are affected by CVE-2022-23647?

2 open source packages ship an affected version, including prismjs. It affects 1 product.

Products include Prismjs Prism.

How do I fix CVE-2022-23647?

Upgrade prismjs to 1.27.0 or later.

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-2022-23647 being exploited?

There is no known exploitation of CVE-2022-23647 in the wild and no public exploit code.

Other vulnerabilities in PrismJS prism

• CVE-2021-3801 Inefficient Regular Expression Complexity in prismjs/prism High 7.5
• CVE-2021-23341 Regular Expression Denial of Service (ReDoS) High 7.5
• CVE-2024-53382 PrismJS DOM Clobbering vulnerability Medium 4.9

Sources

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

Also known as DEBIAN-CVE-2022-23647, GHSA-3949-f494-cm99, ROOT-APP-NPM-CVE-2022-23647, UBUNTU-CVE-2022-23647.