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CVE-2025-9784

HIGHCVSS 7.5/10EPSS 2.17%

Last modified

CVE-2025-9784 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 2.17% chance of exploitation in the next 30 days.

Description

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).

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
2.17%

80.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
RedhatBuild Of Apache Camel For Spring BootAll versions
RedhatFuse7.0.0
RedhatJboss Enterprise Application Platform7.0.0
RedhatJboss Enterprise Application Platform8.0.0
RedhatJboss Enterprise Application Platform Expansion PackAll versions
RedhatProcess Automation7.0
RedhatSingle Sign-On7.0
RedhatUndertowAll versions
RedhatEnterprise Linux8.0
RedhatEnterprise Linux9.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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).
How severe is CVE-2025-9784?
CVE-2025-9784 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.17% probability of exploitation in the next 30 days.
How do I fix CVE-2025-9784?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-9784?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST