{"id":"CVE-2025-11966","title":"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","summary":"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 wh…","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","cwe":["CWE-79","CWE-80"],"vendor":"eclipse","product":"vert.x","affected":["vert.x >= 4.0.0, < 4.5.22","vert.x >= 5.0.0, < 5.0.5"],"patched":["vert.x 5.0.5"],"published":"2025-10-22","updated":"2026-10-08","sourceUpdated":"2026-10-08T11:10:00.250","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-11966","references":[{"url":"https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/303","label":"emo@eclipse.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-11966.json"},{"url":"https://access.redhat.com/security/cve/CVE-2025-11966"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2405789"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-11966"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11966"},{"url":"https://access.redhat.com/errata/RHSA-2026:0131"},{"url":"https://access.redhat.com/errata/RHSA-2026:0134"},{"url":"https://access.redhat.com/errata/RHSA-2025:23417"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00291,"epssPercentile":0.21551,"ingestedAt":"2026-10-08T11:31:27.492Z","scores":{"nvd":6.4,"vendor":4.9},"slug":"CVE-2025-11966","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `vert.x >= 4.0.0, < 4.5.22`\n- `vert.x >= 5.0.0, < 5.0.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vert.x 5.0.5`\n\n## Vendor advisories\n\n- **RHSA-2026:0131** · Red Hat · fixed in: Red Hat build of Quarkus 3.20.4.SP1 · released 2026-01-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:0131)\n- **RHSA-2026:0134** · Red Hat · fixed in: Red Hat build of Quarkus 3.27.1.SP1 · released 2026-01-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:0134)\n- **RHSA-2025:23417** · Red Hat · fixed in: Streams for Apache Kafka 3.1.0 · released 2025-12-16 · [advisory](https://access.redhat.com/errata/RHSA-2025:23417)\n- **Red Hat VEX** · Moderate · affected: Cryostat 4, OpenShift Serverless, Red Hat build of Apache Camel - HawtIO 4, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Apicurio Registry 2, … · no fix planned: Red Hat Fuse 7, Cryostat 4, OpenShift Serverless, Red Hat build of Apache Camel - HawtIO 4, … · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-11966.json)","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}