How severe is CVE-2020-11023?

CVE-2020-11023 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2020-11023?

CVE-2020-11023 affects the following packages: org.webjars.npm:jquery (Maven), jquery (npm), jQuery (NuGet), components/jquery (Packagist), jquery-rails (RubyGems). Ecosystems affected: Maven, npm, NuGet, Packagist, RubyGems.

How do I fix CVE-2020-11023?

Update org.webjars.npm:jquery to version 3.5.0 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Can O3 Security detect CVE-2020-11023 in my codebase?

Yes. O3 Security's Impact-Aware SCA scanner identifies CVE-2020-11023 across all affected ecosystems (Maven, npm, NuGet, Packagist, RubyGems), correlates it against your dependency graph, and uses function-level reachability to confirm whether the vulnerable code path is actually reachable in your application — eliminating false positives. You can scan your stack for CVE-2020-11023 directly from the O3 platform.

Is CVE-2020-11023 actively exploited in the wild?

Yes. There are 8 known exploit references for CVE-2020-11023, including 1 documented proof-of-concept exploit on Exploit-DB and 5 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2020-11023?

CVE-2020-11023 has an EPSS (Exploit Prediction Scoring System) score of 34.1%, placing it in the 97th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2020-11023 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2020-11023 (JQuery Cross-Site Scripting (XSS) Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2025-01-23. CISA required all US federal civilian agencies to remediate this vulnerability by 2025-02-13. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2020-11023?

CVE-2020-11023 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2020-11023 published, and has it been updated?

CVE-2020-11023 was published on April 29, 2020 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2025-01-23 — agencies required to remediate by 2025-02-13

☕ Maven📦 npm.NET NuGet🐘 Packagist💎 RubyGems

CVE-2020-11023

MEDIUM

Potential XSS vulnerability in jQuery

Also known asBIT-drupal-2020-11023GHSA-jpcq-cgw6-v4j6

Published

Apr 29, 2020

Updated

Apr 10, 2026

Affected

5 pkgs

Patched

5 / 5

Exploits

8 known

EPSS Exploitation Probability

via FIRST.org ↗

34.1%probability of exploitation in next 30 days

Moderate Risk97th percentile-0.56%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

5 pkgs affected

☕org.webjars.npm:jquery📦jquery.NETjQuery🐘components/jquery💎jquery-rails

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven, npm, NuGet packages — download data is not available via public APIs for these ecosystems.

Description

In jQuery versions greater than or equal to 1.0.3 and before 3.5.0, passing HTML containing <option> elements from untrusted sources - even after sanitizing it - to one of jQuery's DOM manipulation methods (i.e. .html(), .append(), and others) may execute untrusted code. This problem is patched in jQuery 3.5.0.

Affected Packages

5 total 5 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.webjars.npm:jquery`	≥ 1.0.3&&< 3.5.0	3.5.0
📦npm	`jquery`	≥ 1.0.3&&< 3.5.0	3.5.0
.NETNuGet	`jQuery`	≥ 1.0.3&&< 3.5.0	3.5.0
🐘Packagist	`components/jquery`	≥ 1.0.3&&< 3.5.0	3.5.0
💎RubyGems	`jquery-rails`	all versions	4.4.0

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-49767webappsmultiple

jQuery 1.0.3 - Cross-Site Scripting (XSS)

by Central InfoSec · Apr 14, 2021

Exploit-DB Source

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2020-11023 in your stack?

O3 detects CVE-2020-11023 across Maven, npm, NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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