Unsynchronized Access to Shared Data in a Multithreaded Context in RESTEasy

published 2021-05-26 5 y ago modified 2026-06-17 4 mo ago also GHSA-9699-gm7f-cmjv , EUVD-2021-1298

cvss: 4.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

A flaw was found in RESTEasy, where an incorrect response to an HTTP request is provided. This flaw allows an attacker to gain access to privileged information. The highest threat from this vulnerability is to confidentiality and integrity. Versions before resteasy 2.0.0.Alpha3 are affected.

Patch / fix

fixed in 3

maven org.jboss.resteasy:resteasy-bom 2.0-beta-2
redhat resteasy 2.0.0
quarkus quarkus 1.11.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-25724 updated 2026-08-04 cvss 4.2

resteasy: information disclosure via HTTP response reuse

Red Hat Text-Only RHOAR
fixed: vendor fix RHSA-2021:1004

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N
GitHub	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	org.jboss.resteasy:resteasy-bom	<2.0-beta-2	2.0-beta-2

Affected products

n/a resteasy

Classification

Weakness

CWE-567 Unsynchronized Access to Shared Data in a Multithreaded Context

References

bugzilla.redhat.com /show_bug.cgi?id=1899354
web, issue-tracking, vendor-advisory
security.netapp.com /advisory/ntap-20210702-0003/
third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-25724
advisory
access.redhat.com /security/cve/cve-2020-25724
web
security.netapp.com /advisory/ntap-20210702-0003
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary