Cross-Site Scripting (XSS) in jquery-ui (CVE-2021-41182, CVSS 6.5)

Summary

Cross-site scripting in jquery-ui (CVE-2021-41182). Data can be tampered with by attackers. Exploitable via altField. Mitigation: upgrade to 1.13.0 or later.

Original description

The description as published by the source.

jQuery-UI is the official jQuery user interface library. Prior to version 1.13.0, accepting the value of the altField option of the Datepicker widget from untrusted sources may execute untrusted code. 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. A workaround is to not accept the value of the altField option from untrusted sources.

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2021-41182 has been found in jquery-ui.
Attackers can target a specific entry point like altField over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 6.5/10.
What to do: upgrade jquery-ui to 1.13.0 or later.
If unsure, ask your IT team or search "jquery-ui CVE-2021-41182" on the vendor's site.

CVE-2021-41182 (jquery-ui) — CWE-79 / CVSS v3 6.5
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: altField / doEvilThing
Patched: 1.13.0 — apply immediately
Workaround: A workaround is to not accept the value of the altField option from untrusted sources.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Cross-site scripting (XSS) (CWE-79) exists in jquery-ui. Attackers reach the vulnerable code path via altField without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of jquery-ui. Attack surface: altField / doEvilThing.

🔥 Severity

Severity: Medium (CVSS 6.5/10). Data can be tampered with by attackers.

🔧 How to fix

Update to 1.13.0.

🛡️ Workaround

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

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'jquery-ui' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'jquery-ui' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で jquery-ui を grep し、稼働しているサービス・バージョンを把握する。
2
Apply temporary workaround mitigate
```
A workaround is to not accept the value of the `altField` option from untrusted sources.
```
パッチが適用されるまでの応急処置として、A workaround is to not accept the value of the altField option from untrusted sources. を実施。回避策の副作用 (機能低下) を確認した上で。
3
Apply patch patch
```
Upgrade jquery-ui to 1.13.0
```
ステージング環境で 1.13.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
4
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

npm jquery-ui

[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.13.0"}]}]

NuGet jQuery.UI.Combined

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.0"}]}]

RubyGems jquery-ui-rails

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0"}]}]

Maven org.webjars.npm:jquery-ui

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.0"}]}]

Bitnami drupal

[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.86.0"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2021-41182 jqueryui Fixed in: 1.13.0+dfsg-1

Cross-Site Scripting (XSS) in jquery-ui (CVE-2021-41182)