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.
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.
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Bumps sanitize from 5.2.0 to 5.2.1.
Release notes
Sourced from sanitize's releases.
Changelog
Sourced from sanitize's changelog.
Commits
773d1afRelease 5.2.1a11498dFix sanitization bypass in HTML foreign content1d0d688Update the "Supported Versions" policy to be more realisticDependabot 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
@dependabot rebase.Dependabot commands and options
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