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CVE-2021-22573

23
FAUCET Score

CVE-2021-22573 describes a critical vulnerability in the Google OAuth Client Library for Java where the IDToken verifier fails to properly validate token signatures, allowing an attacker to forge tokens with custom payloads. This flaw, rated 7.3 HIGH on the CVSS scale, could lead to high confidentiality and integrity impacts if exploited. While no active exploitation, public exploit code, or significant community discussion has been observed, affected organizations should upgrade to version 1.33.3 or above to mitigate the risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.33.3CPE matchmatch criteria
cpe:2.3:a:google:oauth_client_library_for_java:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.7HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.30%
Probability of exploitation in next 30 days
EPSS Percentile
21.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0030 is in the 26th percentile among its peer group of 890 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.google.oauth-client:google-oauth-clientFixed in: 1.33.3
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.10.2.P1Fixed in: google-oauth-client
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.11Fixed in: google-oauth-client
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Fuse Online 7.10.2.P1Fixed in: google-oauth-client
View patch
redhatpatch availablevia redhat_api
Product: RHINT Camel-Springboot 3.14.5Fixed in: google-oauth-client
View patch
redhatno patchvia redhat_api
Product: Logging Subsystem for Red Hat OpenShiftFixed in: google-oauth-client
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: jenkins-2-plugins
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: jenkins-2-plugins

Vendor Advisories (2)

mavenGHSA-hw42-3568-wj87high

google-oauth-java-client improperly verifies cryptographic signature

Apr 9, 2024
redhatCVE-2021-22573Important

google-oauth-client: Token signature not verified

May 3, 2022

References

github.com / googleapis/google-oauth-java-client/pull/872
Issue TrackingPatchRelease NotesThird Party Advisory