GHSA-vfvf-mqq8-rwqc

Sanitization bypass using HTML Entities in marked

At a glance

Published
Updated
CVE
CVE-2016-10531
CVSS_V3
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

Affected versions of `marked` are susceptible to a cross-site scripting vulnerability in link components when `sanitize:true` is configured. ## Proof of Concept This flaw exists because link URIs containing HTML entities get processed in an abnormal manner. Any HTML Entities get parsed on a best-effort basis and included in the resulting link, while if that parsing fails that character is omitted. For example: A link URI such as ``` javascript&#x58document;alert(1) ``` Renders a valid link that when clicked will execute `alert(1)`. ## Recommendation Update to version 0.3.6 or later.

Affected packages

PackageVersions
npm · markedintroduced 0, fixed 0.3.6

References

Sources

SourceLicence
OSV.devCC-BY 4.0 — GitHub Advisory Database