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CVE-2025-5115

7.5 · HIGH

In Eclipse Jetty, versions <=9.4.57, <=10.0.25, <=11.0.25, <=12.0.21, <=12.1.0.alpha2, an HTTP/2 client may trigger the server to send RST_STREAM frames, for example by sending frames that are malf…

Published Aug 20, 2025CWE-400EPSS 3.63%

Overview

CVE-2025-5115 is a high-severity vulnerability. It was published on August 20, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In Eclipse Jetty, versions <=9.4.57, <=10.0.25, <=11.0.25, <=12.0.21, <=12.1.0.alpha2, an HTTP/2 client may trigger the server to send RST_STREAM frames, for example by sending frames that are malformed or that should not be sent in a particular stream state, therefore forcing the server to consume resources such as CPU and memory.

For example, a client can open a stream and then send WINDOW_UPDATE frames with window size increment of 0, which is illegal.

Per specification https://www.rfc-editor.org/rfc/rfc9113.html#name-window_update , the server should send a RST_STREAM frame.

The client can now open another stream and send another bad WINDOW_UPDATE, therefore causing the server to consume more resources than necessary, as this case does not exceed the max number of concurrent streams, yet the client is able to create an enormous amount of streams in a short period of time.

The attack can be performed with other conditions (for example, a DATA frame for a closed stream) that cau

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/jetty/jetty.project/pull/13449GitHubgithub.com/jetty/jetty.project/releases/tag/jetty-10.0.26GitHubgithub.com/jetty/jetty.project/releases/tag/jetty-11.0.26GitHubgithub.com/jetty/jetty.project/releases/tag/jetty-12.0.25GitHubgithub.com/jetty/jetty.project/releases/tag/jetty-12.1.0GitHubgithub.com/jetty/jetty.project/releases/tag/jetty-9.4.58.v20250814GitHubgithub.com/jetty/jetty.project/security/advisories/GHSA-mmxm-8w33-wc4hRefwww.openwall.com/lists/oss-security/2025/08/20/4Refwww.openwall.com/lists/oss-security/2025/09/17/1Reflists.debian.org/debian-lts-announce/2025/09/msg00014.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-5115?

CVE-2025-5115 is a high-severity vulnerability. It was published on August 20, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-5115?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-5115?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-5115?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-5115 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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