CVE-2025-66675 Apache Struts: File leak in multipart request processing causes disk exhaustion (DoS) - version ranges fixed

What is CVE-2025-66675?

CVE-2025-66675 is a high-severity denial of service vulnerability in Apache Struts, published on 10 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Denial of Service vulnerability in Apache Struts, file leak in multipart request processing causes disk exhaustion.

This issue affects Apache Struts: from 2.0.0 through 6.7.4, from 7.0.0 through 7.0.3.

Users are recommended to upgrade to version 6.8.0 or 7.1.1, which fixes the issue.

It's related to  https://cve.org/CVERecord?id=CVE-2025-64775  - this CVE addresses missing affected version 6.7.4

Weakness: CWE-459

Which versions are affected by CVE-2025-66675?

4 open source packages ship an affected version, including org.apache.struts:struts2-core. It affects 1 product.

Products include Apache Struts.

How do I fix CVE-2025-66675?

Upgrade org.apache.struts:struts2-core to a fixed version for your release line: 6.8.0 or 7.1.1.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-66675 being exploited?

There is no known exploitation of CVE-2025-66675 in the wild and no public exploit code.

Other vulnerabilities in Apache Struts

• CVE-2020-17530 Apache Struts Remote Code Execution Exploited Critical 9.8
• CVE-2017-9791 Apache Struts 1 Improper Input Validation Exploited Critical 9.8
• CVE-2017-5638 Apache Struts Remote Code Execution Exploited Critical 9.8
• CVE-2012-0391 Apache Struts 2 Improper Input Validation Exploited Critical 9.8
• CVE-2018-11776 Apache Struts Remote Code Execution Exploited High 8.1

All Apache Struts vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-rg58-xhh7-mqjw.