High (7.5) in apache struts. EPSS 8.6% chance of exploitation in the next 30 days. Fixed in org.apache.struts:struts2-rest-plugin 2.5.16.
The Apache Struts REST Plugin is using XStream library which is vulnerable and allow perform a DoS attack when using a malicious request with specially crafted XML payload. Upgrade to the Apache Struts version 2.5.16 and switch to an optional Jackson XML handler as described here http://struts.apache.org/plugins/rest/#custom-contenttypehandlers. Another option is to implement a custom XML handler based on the Jackson XML handler from the Apache Struts 2.5.16.
Severity
CVSS 3.0
7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
8.6% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-31)