Spring Security Advisories

CVE-2017-4971: Data Binding Expression Vulnerability in Spring Web Flow

MEDIUM | MAY 31, 2017 | CVE-2017-4971


Applications that do not change the value of the MvcViewFactoryCreator useSpringBinding property which is disabled by default (i.e. set to “false”) can be vulnerable to malicious EL expressions in view states that process form submissions but do not have a sub-element to declare explicit data binding property mappings.

Affected Spring Products and Versions

  • Spring Web Flow 2.4.0 to 2.4.4
  • Older unsupported versions are also affected


Users of affected versions should apply the following mitigation:

  • 2.4.x users should upgrade to 2.4.5
  • Note that generally it is a good practice and recommended to always use explicit data binding declarations in view states in order to prevent form submissions from setting fields on the target object that should not be set.
  • Spring Web Flow with JSF users are not impacted by this report.


The issue was identified by Stefano Ciccone of Gotham Digital Science



  • 2017-05-31: Initial vulnerability report published

Get ahead

VMware offers training and certification to turbo-charge your progress.

Learn more

Get support

Spring Runtime offers support and binaries for OpenJDK™, Spring, and Apache Tomcat® in one simple subscription.

Learn more

Upcoming events

Check out all the upcoming events in the Spring community.

View all