CVE-2020-5289Network attack vector

Field-value disclosure via unauthorized filter joins

Published Mar 30, 2020 · Updated Aug 4, 2024

Improper authorization in Yahoo Elide before 4.5.14 allows remote authenticated users to infer unreadable model-field values via filters. Filter joins accept client-provided expressions without applying ReadPermission to every referenced field, so result membership becomes an oracle. The attack requires read access to one field in a model that protects another field, and exposes only inferred values.

CVSS severity6.8
Medium
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Yahoo Elide before 4.5.14 allows remote authenticated users to infer unreadable model-field values via filters. Filter joins accept client-provided expressions without applying ReadPermission to every referenced field, so result membership becomes an oracle. The attack requires read access to one field in a model that protects another field, and exposes only inferred values.

The record

CVE
CVE-2020-5289
Published
Mar 30, 2020
Updated
Aug 4, 2024
Vendor
Yahoo
Product
Elide
Classifications
CWE-552, CWE-285, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 30, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.5.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Yahoo · Elideversion=< 4.5.14

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-552Files or Directories Accessible to External Parties
CWE-285Improper Authorization
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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