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CVE-2021-22565

22
FAUCET Score

CVE-2021-22565 is a medium-severity vulnerability affecting the Google Exposure Notification Verification Server (V1.1.2 or earlier) that allows an attacker to prematurely expire a patient's verification code. This prevents the patient from uploading their Temporary Exposure Keys (TEKs) and generating exposure notifications. The vulnerability has a CVSS score of 6.5, indicating a network-based attack with low complexity, resulting in limited integrity and availability impacts (I:L/A:L). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.2CPE matchmatch criteria
cpe:2.3:a:google:exposure_notification_verification_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
34.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 22nd percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/google/exposure-notifications-verification-serverFixed in: 1.1.2

Vendor Advisories (1)

goGHSA-wx8q-rgfr-cf6vmedium

Insufficient Granularity of Access Control in github.com/google/exposure-notifications-verification-server

Nov 10, 2021

References

github.com / google/exposure-notifications-verification-server/releases/tag/v1.1.2
PatchRelease NotesThird Party Advisory
github.com / google/exposure-notifications-verification-server/security/advisories/GHSA-wx8q-rgfr-cf6v
Third Party Advisory