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CSS Injection · passage 1 of 9

CSS Injection

Text · CSS Injection/README.md

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> CSS Injection is a vulnerability that occurs when an application allows untrusted CSS to be injected into a web page. This can be exploited to exfiltrate sensitive data, such as CSRF tokens or other secrets, by manipulating the page layout or triggering network requests based on element attributes.

Source: CSS Injection/README.md in PayloadsAllTheThings. From PayloadsAllTheThings by Swissky and contributors. MIT License, Copyright (c) 2019 Swissky.

Data as of 2026-11-15. CVE List through 2026-11-15 · EPSS of 2026-11-14 · CISA KEV checked 2026-11-15. Source: PayloadsAllTheThings by Swissky and contributors, MIT License. For authorised testing only.