XSS in the altField option of the Datepicker widget in jquery-ui

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS

• CVE-2021-41182: 39.36% estimated exploitation activity in the next 30 days; percentile 98.61 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact Accepting the value of the altField option of the Datepicker widget from untrusted sources may execute untrusted code. For example, initializing the datepicker in the following way: will call the doEvilThing function. Patches The issue is fixed in jQuery UI 1.13.0. Any string value passed to the altField option is now treated as a CSS selector. Workarounds A workaround is to not accept the value of the altField 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.

Published by the source

26 Oct 2021, 14:55 UTC

Last modified by the source

8 Jul 2026, 06:29 UTC

Source last checked

26 Oct 2026, 12:26 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-9gj3-hwp5-pmwc

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-9gj3-hwp5-pmwc

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# Patch Next advisory brief: CVE-2021-41182

Advisory: XSS in the `altField` option of the Datepicker widget in jquery-ui
IDs: CVE-2021-41182, GHSA-9gj3-hwp5-pmwc
Record: https://patchnext.com/advisories/cve-2021-41182 (revision 2, source checked 26 Oct 2026, 12:26 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.webjars.npm:jquery-ui 1.13.0; jquery.ui.combined 1.13.0; jquery-ui 1.13.0; jquery-ui-rails 7.0.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.webjars.npm:jquery-ui: affected < 1.13.0; fixed in 1.13.0
- NuGet jquery.ui.combined: affected < 1.13.0; fixed in 1.13.0
- npm jquery-ui: affected < 1.13.0; fixed in 1.13.0
- RubyGems jquery-ui-rails: affected < 7.0.0; fixed in 7.0.0

## Suggested inspection (read-only)
- Maven org.webjars.npm:jquery-ui: check the installed version with your package manager.
- NuGet jquery.ui.combined: check the installed version with your package manager.
- `npm ls jquery-ui --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.
- RubyGems jquery-ui-rails: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.webjars.npm:jquery-ui, jquery.ui.combined, jquery-ui, jquery-ui-rails.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-9gj3-hwp5-pmwc (OSV record GHSA-9gj3-hwp5-pmwc lists affected ranges: npm jquery-ui >=0 =0 =0 =0 <1.13.0 (fixed))
- Verified: https://github.com/advisories/GHSA-9gj3-hwp5-pmwc (GitHub-reviewed advisory GHSA-9gj3-hwp5-pmwc lists affected ranges: npm jquery-ui >=0 =0 =0 =0 <7.0.0)

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