What’s Vulnerable › Vulnerabilities

CVE-2021-21400: Entering code in App Lock modal sends input to conversation

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-02 · updated 2026-06-17
• Weakness: CWE-200

Description

wire-webapp is an open-source front end for Wire, a secure collaboration platform. In wire-webapp before version 2021-03-15-production.0, when being prompted to enter the app-lock passphrase, the typed passphrase will be sent into the most recently used chat when the user does not actively give focus to the input field. Input element focus is enforced programatically in version 2021-03-15-production.0.

Affected products

• wireapp wire-webapp: through 2019-07-11-13-18; 2019-02-11-staging0, 2019-02-11-staging1, 2019-02-11-staging2, 2019-02-13-staging0, 2019-02-18-staging0, 2019-02-27-staging0 (+185)

References

• https://github.com/wireapp/wire-webapp/commit/281f2a9d795f68abe423c116d5da4e1e73a60062
• https://github.com/wireapp/wire-webapp/pull/10704
• https://github.com/wireapp/wire-webapp/releases/tag/2021-03-15-production.0
• https://github.com/wireapp/wire-webapp/security/advisories/GHSA-cxwr-f2j3-q8hp
• https://github.com/wireapp/wire-webapp/commit/281f2a9d795f68abe423c116d5da4e1e73a60062
• https://github.com/wireapp/wire-webapp/pull/10704
• https://github.com/wireapp/wire-webapp/releases/tag/2021-03-15-production.0
• https://github.com/wireapp/wire-webapp/security/advisories/GHSA-cxwr-f2j3-q8hp

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