ActionServlet.java in Apache Struts 1 1.x through 1.3.10 mishandles multithreaded access to an ActionForm instance, which allows remote attackers to execute arbitrary code or cause a denial of service (unexpected memory access) via a multipart request, a related issue to CVE-2015-0899.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.092
EPSS Ranking 92.3%