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Rules reference

react-doctor/svg-filter-clickjacking-risk

Applying CSS or SVG filters over a cross-origin iframe can be used for clickjacking or to read pixels from framed content the attacker should not see.

  • Category: Security
  • Severity: warn
  • Source: oxlint-plugin-react-doctor
  • Framework: global
  • Enabled when: production source files (.js/.ts/.jsx/.tsx); test/scripts/docs/generated paths skipped

Validation prompt

Use this to decide whether a fired diagnostic is real or a false positive.

Fires in production source when an <iframe> sits within ~700 characters of a CSS filter reference (filter: url(#…), in either order) or an SVG filter primitive (<feDisplacementMap>, <feColorMatrix>, <feComposite>, <feTile>, <feMorphology>) near an iframe — the textual proximity used to build an SVG/CSS-filter clickjacking or visual-exfiltration primitive over an embedded frame. Detection is case-insensitive substring proximity, not real DOM scoping. FALSE POSITIVE: the iframe and the filter are unrelated code that merely happen to fall within the window (a filter applied to a chart/image elsewhere in the same file), or the iframe is same-origin first-party UI where filtering is intentional decoration — confirm the filter actually applies to a cross-origin or privileged frame.

Fix prompt

Use this once validation confirms the diagnostic is real.

Do not apply CSS or SVG filters to cross-origin or privileged iframes; remove the filter/fe* primitive from the embedded frame's render path. Protect sensitive pages from being framed with Content-Security-Policy: frame-ancestors 'self' (or 'none') plus X-Frame-Options. Apply visual effects only to first-party content you control, never to embedded third-party UI.