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CVE-2021-21400

21
FAUCET Score

CVE-2021-21400 describes a vulnerability in wire-webapp, an open-source front end for the Wire secure collaboration platform, affecting versions prior to 2021-03-15-production.0. This flaw allows a user's app-lock passphrase to be inadvertently sent to the most recently used chat if the input field is not actively focused when typing. Rated as MEDIUM severity with a CVSS score of 6.5, the vulnerability has a network attack vector and low attack complexity, potentially leading to high confidentiality impact by exposing sensitive passphrases. There is currently no evidence of active exploitation, no public exploit code available (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2019-07-11-13-18CPE matchmatch criteria
cpe:2.3:a:wire:wire-webapp:*:*:*:*:*:*:*:*
2019-02-11CPE matchmatch criteria
cpe:2.3:a:wire:wire-webapp:2019-02-11:staging0:*:*:*:*:*:*
2019-02-11CPE matchmatch criteria
cpe:2.3:a:wire:wire-webapp:2019-02-11:staging1:*:*:*:*:*:*
2019-02-11CPE matchmatch criteria
cpe:2.3:a:wire:wire-webapp:2019-02-11:staging2:*:*:*:*:*:*
2019-02-13CPE matchmatch criteria
cpe:2.3:a:wire:wire-webapp:2019-02-13:staging0:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.12%
Probability of exploitation in next 30 days
EPSS Percentile
62.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 75th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / wireapp/wire-webapp/commit/281f2a9d795f68abe423c116d5da4e1e73a60062
PatchThird Party Advisory
github.com / wireapp/wire-webapp/pull/10704
PatchThird Party Advisory
github.com / wireapp/wire-webapp/releases/tag/2021-03-15-production.0
Release NotesThird Party Advisory
github.com / wireapp/wire-webapp/security/advisories/GHSA-cxwr-f2j3-q8hp
Third Party Advisory