CVE-2025-11966

MEDIUM
6.4
CVSS Score
Published: October 22, 2025 at 02:44 PM UTC
Updated: October 8, 2026 at 11:10 AM UTC
1 product affected across 1 vendorVert.x

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.0.0 ≤ v < 4.5.225.0.0 ≤ v < 5.0.5*4.0.05.0.0
Affected range stops below 4.5.22, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

ExploitIssue TrackingVendor Advisory
Source: cverecord
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/303

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79CWE-80

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