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CVE-2020-15138

7.1 · HIGH

Prism is vulnerable to Cross-Site Scripting.

Published Aug 7, 2020CWE-79EPSS 2.04%

Overview

CVE-2020-15138 is a high-severity vulnerability. It was published on August 7, 2020 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/PrismJS/prism/pull/2506/commits/7bd7de05edf71112a3a77f87901a2409c9c5c20cGitHubgithub.com/PrismJS/prism/security/advisories/GHSA-wvhm-4hhf-97x9Refprismjs.com/plugins/previewers/#disabling-a-previewerGitHubgithub.com/PrismJS/prism/pull/2506/commits/7bd7de05edf71112a3a77f87901a2409c9c5c20cGitHubgithub.com/PrismJS/prism/security/advisories/GHSA-wvhm-4hhf-97x9Refprismjs.com/plugins/previewers/#disabling-a-previewer

How CyberStrike helps

Frequently asked questions

What is CVE-2020-15138?

CVE-2020-15138 is a high-severity vulnerability. It was published on August 7, 2020 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2020-15138?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-15138?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-15138?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-15138 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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