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

Moderate severity GitHub Reviewed Published Oct 25, 2021 in jquery/jquery-ui • Updated Sep 26, 2023

Package

nuget jQuery.UI.Combined (NuGet)

Affected versions

< 1.13.0

Patched versions

1.13.0
npm jquery-ui (npm)
< 1.13.0
1.13.0
bundler jquery-ui-rails (RubyGems)
< 7.0.0
7.0.0
maven org.webjars.npm:jquery-ui (Maven)
< 1.13.0
1.13.0

Description

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:

$( "#datepicker" ).datepicker( {
	altField: "<img onerror='doEvilThing()' src='/404' />",
} );

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.

References

@mgol mgol published to jquery/jquery-ui Oct 25, 2021
Reviewed Oct 25, 2021
Published to the GitHub Advisory Database Oct 26, 2021
Published by the National Vulnerability Database Oct 26, 2021
Last updated Sep 26, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS score

0.325%
(71st percentile)

Weaknesses

CVE ID

CVE-2021-41182

GHSA ID

GHSA-9gj3-hwp5-pmwc

Source code

Credits

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