CVE-2025-12799CWE-79cross-site-scripting

CVE-2025-12799

Medium · published July 7, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
33.9
In the wild
Unconfirmed
What it is

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 improper input handling.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00408 · 33.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-07T21:16Z
References (6)
https://access.redhat.com/errata/RHSA-2026:36342 · [email protected]https://access.redhat.com/errata/RHSA-2026:36343 · [email protected]https://access.redhat.com/errata/RHSA-2026:36344 · [email protected]https://access.redhat.com/errata/RHSA-2026:36345 · [email protected]https://access.redhat.com/security/cve/CVE-2025-12799 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2413071 · [email protected]
EPSS history
Timeline
  • 07 JUL 16:18Z
    Jastow: jastow cross-site scripting attack due to unsanitized uri
    cvelistv5