CVE-2021-21400

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

1.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 68.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-04-02 14:50Z5 YR AGO

Last updated

2024-08-03 18:09Z2 YR AGO

Reserved

2020-12-22

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

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

Weaknesses

• CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass

Data version

5.1

Document digest

1f70e734a8034748b3d288fc09365c42fb504c751af609a0e04383c3b58ee89d

• github.comhttps://github.com/wireapp/wire-webapp/security/advisories/GHSA-cxwr-f2j3-q8hpx_refsource_CONFIRM
• github.comhttps://github.com/wireapp/wire-webapp/pull/10704x_refsource_MISC
• github.comhttps://github.com/wireapp/wire-webapp/releases/tag/2021-03-15-production.0x_refsource_MISC
• github.comhttps://github.com/wireapp/wire-webapp/commit/281f2a9d795f68abe423c116d5da4e1e73a60062x_refsource_MISC