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Cross-site scripting: keeping untrusted content in its place

A CISA and FBI alert addressed cross-site scripting vulnerabilities in software. These flaws can allow untrusted content to affect a user’s browser session when applications handle it unsafely.

This briefing explains a public 2024 advisory. It is not a live incident feed; consult the original source and current vendor guidance for updates.

What the advisory tells us

The secure-by-design alert addresses cross-site scripting as a software vulnerability class. It calls on manufacturers to reduce the defect in products rather than treating every occurrence as an isolated customer issue.

What teams can do

Development teams should use appropriate output encoding and frameworks with safe defaults, and test how untrusted content is handled. Ask software providers about their secure development practices.

Read the original advisory

FBI IC3 / federal partners: source advisory (PDF) ↗

The linked advisory is an independent government source. It does not endorse CyberWall or its products.

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