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GHSA-3949-f494-cm99

Cross-site Scripting in Prism

Source: GitHub Advisory Database (reviewed) High CVE-2022-23647

Packages

EcosystemPackageAffectedFixed in
npm prismjs >= 1.14.0, < 1.27.0 1.27.0

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Prism's [Command line plugin](https://prismjs.com/plugins/command-line/) can be used by attackers to achieve an XSS 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. ### Patches This bug has been fixed in v1.27.0. ### Workarounds Do not use the Command line plugin on untrusted inputs, or sanitized all code blocks (remove all HTML code text) from all code blocks that use the Command line plugin. ### References - https://github.com/PrismJS/prism/pull/3341

References

External links from the advisory. They lead to third-party sites.