CVE-2025-12799

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-07-07. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
6.5
EG Score
6.5(high)
EPSS
15.8%
KEV
Not listed

Published

July 7, 2026

Last Modified

July 9, 2026

Advisory Details (2)

Auto-updated Jul 7, 2026
Patch available. Sources: redhat.
redhat Patch Available

2413071 – (CVE-2025-12799) CVE-2025-12799 jastow: Jastow Cross-Site Scripting attack due to unsanitized URI

https://bugzilla.redhat.com/show_bug.cgi?id=2413071
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2025-12799

Vendor Advisories for CVE-2025-12799(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatio.undertow.jastow-jastow2026-07-07redhat
redhateap8-wildfly-javadocs-0:8.1.1-11.GA_redhat_00019.1.el8eap2026-07-07redhat
redhateap8-wildfly-javadocs-0:8.1.1-11.GA_redhat_00019.1.el9eap2026-07-07redhat
redhateap8-yasson-0:3.0.4-5.redhat_00007.1.el10eap2026-07-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 30× in last 7d / 36× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 01:59 UTCEPSS rescore
  4. 2026-07-15 01:59 UTCEPSS rescore
  5. 2026-07-15 01:16 UTCEG score recompute
  6. 2026-07-15 01:16 UTCVendor advisory
  7. 2026-07-15 01:16 UTCGHSA enrichment
  8. 2026-07-14 00:04 UTCEG score recompute
  9. 2026-07-14 00:04 UTCVendor advisory
  10. 2026-07-14 00:04 UTCGHSA enrichment
  11. 2026-07-13 22:29 UTCEPSS rescore
  12. 2026-07-13 22:29 UTCEPSS rescore
  13. 2026-07-13 06:12 UTCEPSS rescore
  14. 2026-07-12 22:51 UTCEG score recompute
  15. 2026-07-12 22:51 UTCVendor advisory
  16. 2026-07-12 22:51 UTCGHSA enrichment
  17. 2026-07-12 05:46 UTCEPSS rescore
  18. 2026-07-12 05:45 UTCEPSS rescore
  19. 2026-07-11 21:39 UTCEG score recompute
  20. 2026-07-11 21:39 UTCVendor advisory
  21. 2026-07-11 21:39 UTCGHSA enrichment
  22. 2026-07-11 08:26 UTCEPSS rescore
  23. 2026-07-11 08:26 UTCEPSS rescore
  24. 2026-07-10 20:27 UTCEG score recompute
  25. 2026-07-10 20:27 UTCVendor advisory
Show 11 more
  1. 2026-07-10 20:27 UTCGHSA enrichment
  2. 2026-07-09 19:15 UTCEG score recompute
  3. 2026-07-09 19:15 UTCVendor advisory
  4. 2026-07-09 19:15 UTCGHSA enrichment
  5. 2026-07-09 19:09 UTCEPSS rescore
  6. 2026-07-08 18:02 UTCEG score recompute
  7. 2026-07-08 18:02 UTCVendor advisory
  8. 2026-07-08 18:02 UTCGHSA enrichment
  9. 2026-07-08 15:14 UTCEPSS rescore
  10. 2026-07-07 16:48 UTCEG score recompute
  11. 2026-07-07 16:46 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2025-12799?
CVE-2025-12799 is a medium vulnerability published on July 7, 2026. 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.
When was CVE-2025-12799 disclosed?
CVE-2025-12799 was first published in the National Vulnerability Database on July 7, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-12799 actively exploited?
CVE-2025-12799 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-12799?
CVE-2025-12799 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2025-12799?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-12799, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2025-12799

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