{"id":"CVE-2025-12799","title":"A flaw was found in Jastow","summary":"A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting (XSS) attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to impro…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","cwe":["CWE-79"],"published":"2026-07-07","updated":"2026-09-29","sourceUpdated":"2026-09-29T19:10:00.160","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-12799","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:36342","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:36343","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:36344","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:36345","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2025-12799","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2413071","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00408,"epssPercentile":0.32484,"ingestedAt":"2026-09-29T19:44:04.102Z","slug":"CVE-2025-12799","body":"## Overview\n\nA flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting (XSS) attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}