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

Q: 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.

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.

Published Aug 7, 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.

Affected Software

3 affected components

PrismJS Previewers Prismjs>=1.1.0<1.21.0

Apple Safari

Microsoft Internet Explorer

Remediation

Patch Available

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

Event History

Aug 7, 2020

CVE Published

via MITRE·04:30 PM

Data Sourced

via MITRE·04:30 PM

DescriptionSeverityWeakness

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.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

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