CVE-2025-12799

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2025-210439 (ENISA EUVD) · GHSA-rfhw-2486-47r9 (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 7, 2026

Last Modified

September 29, 2026

Advisory Details (2)

Auto-updated Jul 7, 2026
Patch available. Sources: redhat.
Red HatMentions a patch (unverified)

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
Red HatMentions a patch (unverified)

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 / EcosystemFix (by version range) / PatchReleasedSource
redhateap8-wildfly-javadocs-0:8.1.1-11.GA_redhat_00019.1.el9eap2026-07-07redhat
redhatio.undertow.jastow/jastow:2.2.9.SP1-redhat-000012026-07-07redhat
redhateap8-wildfly-javadocs-0:8.1.1-11.GA_redhat_00019.1.el8eap2026-07-07redhat
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)

Data Freshness Timeline

(refreshed 7× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 98 of 270 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 172 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-03 16:44 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-11-02 16:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-11-01 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-10-25 16:47 UTCEG score recompute
  11. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-10-24 01:48 UTCEG score recompute
  14. 2026-10-24 01:48 UTCVendor advisory
  15. 2026-10-24 01:48 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  16. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-10-22 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-10-21 16:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  19. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  22. 2026-10-18 05:50 UTCEG score recompute
  23. 2026-10-17 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-10-16 16:37 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  25. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
Show 73 more
  1. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  2. 2026-10-13 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-10-12 17:25 UTCEG score recompute
  4. 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  5. 2026-10-11 20:55 UTCEG score recompute
  6. 2026-10-11 19:05 UTCEG score recompute
  7. 2026-10-11 15:46 UTCEG score recompute
  8. 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-10-08 17:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-09-29 19:26 UTCEG score recompute
  20. 2026-09-29 19:26 UTCVendor advisory
  21. 2026-09-29 19:26 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  22. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-09-28 13:37 UTCEG score recompute
  24. 2026-09-28 13:37 UTCVendor advisory
  25. 2026-09-28 13:37 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  26. 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  27. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  29. 2026-09-23 06:17 UTCEG score recompute
  30. 2026-09-23 06:17 UTCVendor advisory
  31. 2026-09-23 06:17 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  32. 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  33. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  34. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  35. 2026-09-18 05:50 UTCEG score recompute
  36. 2026-09-18 05:50 UTCVendor advisory
  37. 2026-09-18 05:50 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  38. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  39. 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  40. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  41. 2026-09-14 11:20 UTCEG score recompute
  42. 2026-09-14 11:20 UTCVendor advisory
  43. 2026-09-14 11:20 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  44. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  45. 2026-09-13 08:32 UTCEG score recompute
  46. 2026-09-13 08:32 UTCVendor advisory
  47. 2026-09-13 08:32 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  48. 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  49. 2026-09-12 03:43 UTCEG score recompute
  50. 2026-09-12 03:43 UTCVendor advisory
  51. 2026-09-12 03:43 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  52. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  53. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  54. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  55. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  56. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  57. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  58. 2026-09-05 22:54 UTCEG score recompute
  59. 2026-09-05 22:54 UTCVendor advisory
  60. 2026-09-05 22:54 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  61. 2026-09-04 13:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  62. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  63. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  64. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  65. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  66. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  67. 2026-08-30 07:43 UTCEG score recompute
  68. 2026-08-30 07:43 UTCVendor advisory
  69. 2026-08-30 07:43 UTCGHSA enrichmentGHSA-rfhw-2486-47r9 · GitHub CVSS 6.5
  70. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  71. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  72. 2026-08-27 21:55 UTCEG score recompute
  73. 2026-08-27 21:55 UTCVendor advisory

Frequently asked(5)

What is CVE-2025-12799?
CVE-2025-12799 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2025-12799 was made public on July 7, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on July 7, 2026. EchelonGraph's copy of the record carries a last-modified date of September 29, 2026; the record at its source may have been updated since.
Is CVE-2025-12799 actively exploited?
CVE-2025-12799 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-12799?
CVE-2025-12799 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-12799?
A fix for CVE-2025-12799 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-12799 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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

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