CVE-2021-22565

Name: CVE-2021-22565
Creator: NVD / NIST
Published: 2021-12-09T13:15:08.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2021-22565 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An attacker could prematurely expire a verification code, making it unusable by the patient, making the patient unable to upload their TEKs to generate exposure notifications. We recommend upgrading the Exposure Notification server to V1.1.2 or greater.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

An attacker could prematurely expire a verification code, making it unusable by the patient, making the patient unable to upload their TEKs to generate exposure notifications. We recommend upgrading the Exposure Notification server to V1.1.2 or greater.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.43%

34.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Google	Exposure Notification Verification Server	< 1.1.2

References

https://github.com/google/exposure-notifications-verification-server/releases/tag/v1.1.2Patch, Release Notes, Third Party Advisory
https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-wx8q-rgfr-cf6vThird Party Advisory
https://github.com/google/exposure-notifications-verification-server/releases/tag/v1.1.2Patch, Release Notes, Third Party Advisory
https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-wx8q-rgfr-cf6vThird Party Advisory

Timeline

Published: Dec 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22565?

How severe is CVE-2021-22565?

CVE-2021-22565 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22565?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22565?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST