GHSA-gw32-9rmw-qwww
svelte is vulnerable to XSS with textarea bind:value
Quick fix
GHSA-gw32-9rmw-qwww — svelte: upgrade to the fixed version with the command below.
npm install svelte@3.59.2Details
### Summary
A server-side rendered `<textarea>` with two-way bound value does not have its value correctly escaped in the rendered HTML.
### Details
In SSR, `<textarea bind:value={...}>` does not have its value escaped when it is rendered into the HTML as `<textarea>...</textarea>`.
### PoC
Put this in a server-side-rendered Svelte component:
``` <script> let value = `test'"></textarea><script` + `>alert('BIM');</sc` + `ript>`; </script>
<textarea bind:value /> ```
### Impact
- Only affects SSR - Needs a `<textarea bind:value>` filled by user content via two-way binding
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