CVE-2021-37700

    Dashboard / Vulnerabilities / CVE-2021-37700

    CVE-2021-37700

    Published: 12 Aug 2021Last Modified: 9 Jul 2026

    Summary:

    Details: @github/paste-markdown is an npm package for pasting markdown objects. A self Cross-Site Scripting vulnerability exists in the @github/paste-markdown before version 0.3.4. If the clipboard data contains the string `<table>`, a **div** is dynamically created, and the clipboard content is copied into its **innerHTML** property without any sanitization, resulting in improper execution of JavaScript in the browser of the victim (the user who pasted the code). Users directed to copy text from a malicious website and paste it into pages that utilize this library are affected. This is fixed in version 0.3.4. Refer the to the referenced GitHub Advisory for more details including an example exploit.

    References: https://www.npmjs.com/package/%40github/paste-markdown, https://github.com/github/paste-markdown/releases/tag/v0.3.4, https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30, https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -32b7ea3f29ae8f256f9d19768387be42678ddf30

    Affected versions

    v0.3.3
    v0.3.2
    v0.3.1
    v0.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-37700 | CVE-DB