6.5

CVE-2025-12799: Jastow: jastow cross-site scripting attack due to unsanitized uri

Awaiting analysis
AliasesRHSA-2026:36342RHSA-2026:36343RHSA-2026:36344
Published 07-07-2026Last modified 29-07-2026

Vulnerability summary

CVE-2025-12799 is a medium (CVSS 6.5) vulnerability in eap8 Red Hat. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 35.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.41%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 07-07-2026
    PublishedVulnerability first disclosed.
  2. 29-07-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.41% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat200 products
  • eap8< 0:1-9.el10eap
  • eap8-activemq-artemis< 0:2.40.0-7.redhat_00015.1.el10eap
  • eap8-activemq-artemis-cli< 0:2.40.0-7.redhat_00015.1.el10eap
  • eap8-activemq-artemis-commons< 0:2.40.0-7.redhat_00015.1.el10eap
  • eap8-activemq-artemis-core-client< 0:2.40.0-7.redhat_00015.1.el10eap

1 vendor · 200 products · Showing 200 of 457

References

29 links
Show all 29 references