JQuery DOM Manipulator XSS (CVE-2020-11023)

Historical catalog analysis: CISA added this entry on January 23, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2020-11023 is a persistent cross-site scripting (XSS) vulnerability identified in JQuery. The flaw exists within JQuery’s DOM manipulators, which may execute untrusted code in a user’s browser session when processing maliciously formed input enclosed in HTML tags.

Exposure and applicability

This vulnerability affects environments utilizing the JQuery library where untrusted data is passed to DOM manipulation functions. Because JQuery is a widely adopted open-source library, this exposure may exist not only in standalone implementations but also within third-party libraries, proprietary software, or other integrated components that rely on vulnerable versions of the project.

Remediation priorities

Based on our analysis, vulnerability management teams should prioritize assets based on their exposure to untrusted user input. The following actions are recommended:

1. Inventory Identification: Identify all instances of JQuery across the environment, including those embedded in third-party vendor software where source code may not be directly managed.
2. Version Alignment: Apply mitigations according to vendor instructions. This typically involves updating to a version where the DOM manipulation logic has been corrected to prevent the execution of untrusted HTML tags.
3. Component Decommissioning: In cases where vendor mitigations are unavailable or cannot be applied without breaking critical functionality, the affected product or library should be discontinued.

How to validate remediation

Verification must move beyond simple version checks, as a deployed update does not inherently guarantee that the vulnerability is neutralized within a specific application’s implementation.

Defenders can verify exposure reduction by confirming that DOM manipulators no longer execute scripts when presented with the maliciously formed HTML tags described in the vulnerability reports. This validation should be performed in a staging environment using authorized test inputs to ensure the library correctly handles or sanitizes untrusted input before it reaches the browser’s execution context.

Limits and open questions

Updating JQuery may reduce the likelihood of this specific XSS vector, but it does not eliminate all XSS risks inherent in how an application handles data. Residual risk remains if other parts of the application logic bypass the library’s protections or if complementary security headers (such as Content Security Policy) are absent. It remains unknown whether this vulnerability has been utilized in ransomware campaigns.

Source and editorial note

CVE-2020-11023: JQuery Cross-Site Scripting (XSS) Vulnerability · Source date: January 23, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: January 26, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 27, 2026 at 00:14 UTC.

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