sarutak opened a new pull request, #53364:
URL: https://github.com/apache/spark/pull/53364
### What changes were proposed in this pull request?
This PR aims to escape user name displayed in historypage.
### Why are the changes needed?
Similar to the issue resolved in #52851, user name should also get escaped
because arbitrary user name can be set through the env var `SPARK_USER`.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
User name displayed in historypage is escaped even if the name is like
`<script>alert('XSS')</script>`
### Was this patch authored or co-authored using generative AI tooling?
No.
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