Is there a public exploit for CVE-2025-9784?

Yes. Proof-of-concept code for CVE-2025-9784 has been published publicly.

Is there a proof of concept for CVE-2025-9784?

Yes — 1 proof-of-concept entry is linked on this page, from public repositories and community submissions. They are listed for authorised testing only.

How severe is CVE-2025-9784?

CVE-2025-9784 scores CVSS 7.5 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 2.33%.

What does CVE-2025-9784 affect?

CVE-2025-9784 affects Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9, Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9, Red Hat Single Sign-On 7.6 for RHEL 8, Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8, Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8, Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9.

7.5 High

A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters.

CVE-2025-9784

A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS).

Proof-of-concept code is published

Public PoC

Public PoCdrackyjr/CVE-2025-97842 stars

Signals come from Exploit-DB, Metasploit, Nuclei and published proof-of-concept repositories. Their absence means nothing was found, not that nothing exists.

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 2.33% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Public PoC
Published: 2 September 2025
Last updated: 4 November 2026
Affected: Red Hat · RHEL-8 based Middleware Containers · Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 · Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7
Assigner: redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

EUVD (ENISA)

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

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Query this programmatically

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