CVE-2020-25724Network attack vector

Information disclosure via unsynchronized response reuse

Published May 26, 2021 · Updated Aug 4, 2024

Unsynchronized response handling in Red Hat RESTEasy before 2.0.0.Alpha3 allows remote authenticated users to read privileged information. Shared HTTP response state is reused without proper synchronization across request-processing threads, causing one request to receive another request's response. Exploitation requires authenticated network access and specific concurrent workloads; the documented consequence is limited to information disclosure.

CVSS severity4.3
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsynchronized response handling in Red Hat RESTEasy before 2.0.0.Alpha3 allows remote authenticated users to read privileged information. Shared HTTP response state is reused without proper synchronization across request-processing threads, causing one request to receive another request's response. Exploitation requires authenticated network access and specific concurrent workloads; the documented consequence is limited to information disclosure.

The record

CVE
CVE-2020-25724
Published
May 26, 2021
Updated
Aug 4, 2024
Vendor
Red Hat
Product
RESTEasy
Classifications
CWE-567, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 2021CVE 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=resteasy 2.0.0.Alpha3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Red Hat · RESTEasyversion=resteasy 2.0.0.Alpha3

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-567Unsynchronized Access to Shared Data in a Multithreaded Context
T1190Exploit Public-Facing Application

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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