CVE-2015-5209 Special top object can be used to access Struts' internals

What is CVE-2015-5209?

CVE-2015-5209 is a high-severity vulnerability in Apache Struts, published on 29 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Apache Struts 2.x before 2.3.24.1 allows remote attackers to manipulate Struts internals, alter user sessions, or affect container settings via vectors involving a top object.

Weakness: CWE-20

Which versions are affected by CVE-2015-5209?

2 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-2015-5209?

Upgrade org.apache.struts:struts2-core to 2.3.24.1 or later.

Is CVE-2015-5209 being exploited?

There is no known exploitation of CVE-2015-5209 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-4qgj-9mvg-3929.