[Security] Build(deps): Bump sanitize from 5.2.0 to 5.2.1 (PR #10054)

Bumps sanitize from 5.2.0 to 5.2.1.

Changelog

Sourced from sanitize's changelog.

5.2.1 (2020-06-16)

Bug Fixes

  • Fixed an HTML sanitization bypass that could allow XSS. This issue affects Sanitize versions 3.0.0 through 5.2.0.

    When HTML was sanitized using the "relaxed" config or a custom config that allows certain elements, some content in a <math> or <svg> element may not have beeen sanitized correctly even if math and svg were not in the allowlist. This could allow carefully crafted input to sneak arbitrary HTML through Sanitize, potentially enabling an XSS (cross-site scripting) attack.

    You are likely to be vulnerable to this issue if you use Sanitize's relaxed config or a custom config that allows one or more of the following HTML elements:

    • iframe
    • math
    • noembed
    • noframes
    • noscript
    • plaintext
    • script
    • style
    • svg
    • xmp

    See the security advisory for more details, including a workaround if you're not able to upgrade: GHSA-p4x4-rw2p-8j8m

    Many thanks to Michał Bentkowski of Securitum for reporting this issue and helping to verify the fix.

Commits
  • 773d1af Release 5.2.1
  • a11498d Fix sanitization bypass in HTML foreign content
  • 1d0d688 Update the "Supported Versions" policy to be more realistic
  • See full diff in compare view

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GitHub

We’ve just been alerted that this update fixes a security vulnerability:

Sourced from The GitHub Security Advisory Database.

Cross-site Scripting in Sanitize When HTML is sanitized using Sanitize’s “relaxed” config or a custom config that allows certain elements, some content in a <math> or <svg> element may not be sanitized correctly even if math and svg are not in the allowlist.

You are likely to be vulnerable to this issue if you use Sanitize’s relaxed config or a custom config that allows one or more of the following HTML elements:

  • iframe
  • math
  • noembed
  • noframes
  • noscript
  • plaintext … (truncated)

Affected versions: [">= 3.0.0, < 5.2.1"]

The title of this pull request changed from “Build(deps): Bump sanitize from 5.2.0 to 5.2.1” to "[Security] Build(deps): Bump sanitize from 5.2.0 to 5.2.1