What is CVE-2020-15138?

CVE-2020-15138 is a vulnerability in Prism where the easing preview of the Previewers plugin has a Cross-Site Scripting (XSS) vulnerability.

How can an attacker exploit CVE-2020-15138?

An attacker can exploit CVE-2020-15138 by executing arbitrary code through the XSS vulnerability in the easing preview of the Previewers plugin in Safari and Internet Explorer.

What is the severity of CVE-2020-15138?

CVE-2020-15138 has a severity rating of 7.5 (High).

How can I fix CVE-2020-15138?

To fix CVE-2020-15138, update Prism to a version higher than or equal to v1.1.0 and disable the Previewers plugin, or apply the patch provided by PrismJS.

Vulnerability/
CVE-2020-15138

high

7.5

CWE

7/8/2020

4/8/2024

CVE-2020-15138: Cross-Site Scripting in Prism

Q: Who is affected by CVE-2020-15138?

All Safari and Internet Explorer users of Prism >= v1.1.0 that use the Previewers plugin are affected by CVE-2020-15138.

First published: Fri Aug 07 2020(Updated: )

Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism >=v1.1.0 that use the _Previewers_ plugin (>=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Prismjs Previewers	>=1.1.0<1.21.0
Apple Safari
Microsoft Internet Explorer

Remedy

https://github.com/PrismJS/prism/pull/2506/commits/7bd7de05edf71112a3a77f87901a2409c9c5c20c

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Reference Links

Frequently Asked Questions

What is CVE-2020-15138?
CVE-2020-15138 is a vulnerability in Prism where the easing preview of the Previewers plugin has a Cross-Site Scripting (XSS) vulnerability.
Who is affected by CVE-2020-15138?
All Safari and Internet Explorer users of Prism >= v1.1.0 that use the Previewers plugin are affected by CVE-2020-15138.
How can an attacker exploit CVE-2020-15138?
An attacker can exploit CVE-2020-15138 by executing arbitrary code through the XSS vulnerability in the easing preview of the Previewers plugin in Safari and Internet Explorer.
What is the severity of CVE-2020-15138?
CVE-2020-15138 has a severity rating of 7.5 (High).
How can I fix CVE-2020-15138?
To fix CVE-2020-15138, update Prism to a version higher than or equal to v1.1.0 and disable the Previewers plugin, or apply the patch provided by PrismJS.

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