Is CVE-2025-11966 actively exploited?

CVE-2025-11966 has no public evidence of in-the-wild exploitation as of 2026-01-20.

What is the CVSS score for CVE-2025-11966?

CVE-2025-11966 has a CVSS score of 2.3 (LOW severity). Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2025-11966?

Patch guidance is available from eclipse security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-11966.

Which products are affected by CVE-2025-11966?

2 products: eclipse vert.x, eclipse vert.x.

CVE-2025-11966 - remediation guidance & executive summary

Description

In Eclipse Vert.x versions [4.0.0, 4.5.21] and [5.0.0, 5.0.4], when "directory listing" is enabled, file and directory names are inserted into generated HTML without proper escaping in the href, title, and link attributes. An attacker who can create or rename files or directories within a served path can craft filenames containing malicious script or HTML content, leading to stored cross-site scripting (XSS) that executes in the context of users viewing the affected directory listing.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: high
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-79 · Cross-site Scripting (XSS)CWE-80

Metadata

Primary Vendor: ECLIPSE
Published: 10/22/2025
Last Modified: 1/20/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-11966

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary