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[fix] only read static value for rel attribute validation #8003

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merged 3 commits into from Nov 10, 2022
Merged

[fix] only read static value for rel attribute validation #8003

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eb2a563
fix: only read static value for rel attribute validation
dominikg Nov 8, 2022
786a75f
fix: ignore dynamic values for rel validation
dominikg Nov 9, 2022
7ac345a
fix: handle missing rel correctly
dominikg Nov 9, 2022
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23 changes: 12 additions & 11 deletions src/compiler/compile/nodes/Element.ts
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Expand Up @@ -620,17 +620,18 @@ export default class Element extends Node {

if (href_static_value === null || href_static_value.match(/^(https?:)?\/\//i)) {
const rel = attribute_map.get('rel');
const rel_values = rel ? rel.get_static_value().split(' ') : [];
const expected_values = ['noreferrer'];

expected_values.forEach(expected_value => {
if (!rel || rel && rel_values.indexOf(expected_value) < 0) {
component.warn(this, {
code: `security-anchor-rel-${expected_value}`,
message: `Security: Anchor with "target=_blank" should have rel attribute containing the value "${expected_value}"`
});
}
});
if (rel == null || rel.is_static) {
const rel_values = rel ? rel.get_static_value().split(' ') : [];
const expected_values = ['noreferrer'];
expected_values.forEach(expected_value => {
if (!rel || rel && rel_values.indexOf(expected_value) < 0) {
component.warn(this, {
code: `security-anchor-rel-${expected_value}`,
message: `Security: Anchor with "target=_blank" should have rel attribute containing the value "${expected_value}"`
});
}
});
}
}
}

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4 changes: 3 additions & 1 deletion test/validator/samples/security-anchor-rel-noreferrer/input.svelte
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Expand Up @@ -28,4 +28,6 @@
<a href="HTTPS://svelte.dev" target="_blank" rel="noreferrer">svelte website (valid)</a>
<a href="HTTPS://svelte.dev" target="_blank" rel="noreferrer noopener">svelte website (valid)</a>
<a href="//svelte.dev" target="_blank" rel="noreferrer">svelte website (valid)</a>
<a href="//svelte.dev" target="_blank" rel="noreferrer noopener">svelte website (valid)</a>
<a href="//svelte.dev" target="_blank" rel="noreferrer noopener">svelte website (valid)</a>
<!-- dynamic rel value should not warn-->
<a href="//svelte.dev" target="_blank" rel={`${Math.random()}`}>svelte website (valid)</a>