CVE-2021-22538

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.71% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 53.3% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-03-31 21:10Z5 YR AGO

Last updated

2024-08-03 18:44Z2 YR AGO

Reserved

2021-01-05

Assigning CNA

Google

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-276Incorrect Default PermissionsBase

Data version

5.1

Document digest

cd91f8b32d6e2bc9a41f396f10359f8514b31313d30aabdbc520256dc68cf4ab

• github.comhttps://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-5v95-v8c8-3rh6x_refsource_CONFIRM
• github.comhttps://github.com/google/exposure-notifications-verification-server/commit/eb8cf40b12dbe79304f1133c06fb73419383cd95x_refsource_CONFIRM
• github.comhttps://github.com/google/exposure-notifications-verification-server/releases/tag/v0.23.1x_refsource_CONFIRM
• github.comhttps://github.com/google/exposure-notifications-verification-server/releases/tag/v0.24.0x_refsource_CONFIRM