CVE-2021-21400
7.1 · HIGHOverview
CVE-2021-21400 is a high-severity vulnerability affecting wire wire-webapp. It was published on April 2, 2021 and has a CVSS 3.1 base score of 7.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from wire. Update wire-webapp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| wire | wire-webapp | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-21400?
CVE-2021-21400 is a high-severity vulnerability affecting wire wire-webapp. It was published on April 2, 2021 and has a CVSS 3.1 base score of 7.1 (HIGH).
How severe is CVE-2021-21400?
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-21400?
Check the references section for vendor advisories and patches from wire. Update wire-webapp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-21400?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21400 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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