RubySec

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CVE-2021-41184 (jquery-ui-rails): XSS in the `of` option of the `.position()` util in jquery-ui

ADVISORIES

GEM

jquery-ui-rails

SEVERITY

CVSS v3.x: 6.5 (Medium)

CVSS v2.0: 4.3 (Medium)

PATCHED VERSIONS

  • >= 7.0.0

DESCRIPTION

Impact

Accepting the value of the of option of the .position() util from untrusted sources may execute untrusted code. For example, invoking the following code:

$("#element").position( {
  my: "left top", at: "right bottom",
  of: "<img onerror='doEvilThing()' src='/404' />",
  collision: "none"
});

will call the doEvilThing() function.

Patches

The issue is fixed in jQuery UI 1.13.0. Any string value passed to the of option is now treated as a CSS selector.

Workarounds

A workaround is to not accept the value of the of option from untrusted sources.

For more information

If you have any questions or comments about this advisory, search for a relevant issue in the jQuery UI repo.

If you don’t find an answer, open a new issue."

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