Some languages before 1.24.0 are vulnerable to Regular Expression Denial of Service (ReDoS).
Impact
When Prism is used to highlight untrusted (user-given) text, an attacker can craft a string that will take a very very long time to highlight. Do not use the following languages to highlight untrusted text.
ASCIIDoc
ERB
Other languages are not affected and can be used to highlight untrusted text.
Prism is a lightweight, robust, and elegant syntax highlighting library. The prismjs package is vulnerable to ReDoS (regular expression denial of service). An attacker that is able to provide a crafted HTML comment as input may cause an application to consume an excessive amount of CPU.
Prism's Command line plugin 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.
This PR contains the following updates:
1.23.0->1.27.0GitHub Vulnerability Alerts
CVE-2021-32723
Some languages before 1.24.0 are vulnerable to Regular Expression Denial of Service (ReDoS).
Impact
When Prism is used to highlight untrusted (user-given) text, an attacker can craft a string that will take a very very long time to highlight. Do not use the following languages to highlight untrusted text.
Other languages are not affected and can be used to highlight untrusted text.
Patches
This problem has been fixed in Prism v1.24.
References
CVE-2021-3801
Prism is a lightweight, robust, and elegant syntax highlighting library. The prismjs package is vulnerable to ReDoS (regular expression denial of service). An attacker that is able to provide a crafted HTML comment as input may cause an application to consume an excessive amount of CPU.
CVE-2022-23647
Impact
Prism's Command line plugin 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
Configuration
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