XSS in Red Hat Jboss Enterprise Application Platform 7
CVE-2025-12799
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Red Hat Jboss Enterprise Application Platform 7
- Red Hat Jboss Enterprise Application Platform 8
- Red Hat Jboss Enterprise Application Platform 8.1
- Red Hat Jboss Enterprise Application Platform 8.1.7.ga — versions 2.2.9.SP1-redhat-00001
- Red Hat Jboss Enterprise Application Platform 8.1 For Rhel 10 — versions 0:1-9.el10eap, 0:2.40.0-7.redhat_00015.1.el10eap, 1:2.0.0-2.redhat_00005.1.el10eap
- Red Hat Jboss Enterprise Application Platform 8.1 For Rhel 8 — versions 0:4.0.10-3.redhat_00001.1.el8eap, 0:2.0.4-1.Final_redhat_00001.1.el8eap, 0:801.7.0-1.GA_redhat_00001.1.el8eap
- Red Hat Jboss Enterprise Application Platform 8.1 For Rhel 9 — versions 0:4.0.10-3.redhat_00001.1.el9eap, 0:2.0.4-1.Final_redhat_00001.1.el9eap, 0:801.7.0-1.GA_redhat_00001.1.el9eap
- Red Hat Jboss Enterprise Application Platform Expansion Pack
- Red Hat Single Sign-On 7
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2025-12799 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:36342 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:36343 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:36344 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:36345 (vendor-advisory)
Frequently asked questions
- What is CVE-2025-12799?
- CVE-2025-12799 is a medium-severity vulnerability in Red Hat Jboss Enterprise Application Platform 7, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-07-07.
- How severe is CVE-2025-12799?
- Medium severity. CVSS v3 base score is 6.5 out of 10.