<p>Bumps <a href="https://github.com/rgrove/sanitize">sanitize</a> from 5.2.0 to 5.2.1.</p>
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/rgrove/sanitize/releases">sanitize's releases</a>.</em></p>
<blockquote>
<h2>v5.2.1</h2>
<h3>Bug Fixes</h3>
<ul>
<li>
<p>Fixed an HTML sanitization bypass that could allow XSS. This issue affects Sanitize versions 3.0.0 through 5.2.0.</p>
<p>When HTML was sanitized using the "relaxed" config or a custom config that allows certain elements, some content in a <code><math></code> or <code><svg></code> element may not have beeen sanitized correctly even if <code>math</code> and <code>svg</code> 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.</p>
<p>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:</p>
<ul>
<li><code>iframe</code></li>
<li><code>math</code></li>
<li><code>noembed</code></li>
<li><code>noframes</code></li>
<li><code>noscript</code></li>
<li><code>plaintext</code></li>
<li><code>script</code></li>
<li><code>style</code></li>
<li><code>svg</code></li>
<li><code>xmp</code></li>
</ul>
<p>See the security advisory for more details, including a workaround if you're not able to upgrade: <a href="https://github.com/rgrove/sanitize/security/advisories/GHSA-p4x4-rw2p-8j8m">GHSA-p4x4-rw2p-8j8m</a></p>
<p>Many thanks to Michał Bentkowski of Securitum for reporting this issue and helping to verify the fix.</p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/rgrove/sanitize/blob/master/HISTORY.md">sanitize's changelog</a>.</em></p>
<blockquote>
<h2>5.2.1 (2020-06-16)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>
<p>Fixed an HTML sanitization bypass that could allow XSS. This issue affects
Sanitize versions 3.0.0 through 5.2.0.</p>
<p>When HTML was sanitized using the "relaxed" config or a custom config that
allows certain elements, some content in a <code><math></code> or <code><svg></code> element may not
have beeen sanitized correctly even if <code>math</code> and <code>svg</code> 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.</p>
<p>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:</p>
<ul>
<li><code>iframe</code></li>
<li><code>math</code></li>
<li><code>noembed</code></li>
<li><code>noframes</code></li>
<li><code>noscript</code></li>
<li><code>plaintext</code></li>
<li><code>script</code></li>
<li><code>style</code></li>
<li><code>svg</code></li>
<li><code>xmp</code></li>
</ul>
<p>See the security advisory for more details, including a workaround if you're
not able to upgrade: <a href="https://github.com/rgrove/sanitize/security/advisories/GHSA-p4x4-rw2p-8j8m">GHSA-p4x4-rw2p-8j8m</a></p>
<p>Many thanks to Michał Bentkowski of Securitum for reporting this issue and
helping to verify the fix.</p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/rgrove/sanitize/commit/773d1af976b0e67a966bd3676ebab4f037395699"><code>773d1af</code></a> Release 5.2.1</li>
<li><a href="https://github.com/rgrove/sanitize/commit/a11498de9e283cd457b35ee252983662f7452aa9"><code>a11498d</code></a> Fix sanitization bypass in HTML foreign content</li>
<li><a href="https://github.com/rgrove/sanitize/commit/1d0d688120fb8309b31859319143ef16f92755eb"><code>1d0d688</code></a> Update the "Supported Versions" policy to be more realistic</li>
<li>See full diff in <a href="https://github.com/rgrove/sanitize/compare/v5.2.0...v5.2.1">compare view</a></li>
</ul>
</details>
<br>
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<p>Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting <code>@dependabot rebase</code>.</p>
<hr>
<details>
<summary>Dependabot commands and options</summary>
<br>
<p>You can trigger Dependabot actions by commenting on this PR:</p>
<ul>
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<p>You can disable automated security fix PRs for this repo from the <a href="https://github.com/openstreetmap/openstreetmap-website/network/alerts">Security Alerts page</a>.</p>
</details>
<hr>
<h4>You can view, comment on, or merge this pull request online at:</h4>
<p> <a href='https://github.com/openstreetmap/openstreetmap-website/pull/2659'>https://github.com/openstreetmap/openstreetmap-website/pull/2659</a></p>
<h4>Commit Summary</h4>
<ul>
<li>Bump sanitize from 5.2.0 to 5.2.1</li>
</ul>
<h4>File Changes</h4>
<ul>
<li>
<strong>M</strong>
<a href="https://github.com/openstreetmap/openstreetmap-website/pull/2659/files#diff-e79a60dc6b85309ae70a6ea8261eaf95">Gemfile.lock</a>
(2)
</li>
</ul>
<h4>Patch Links:</h4>
<ul>
<li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/2659.patch'>https://github.com/openstreetmap/openstreetmap-website/pull/2659.patch</a></li>
<li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/2659.diff'>https://github.com/openstreetmap/openstreetmap-website/pull/2659.diff</a></li>
</ul>
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