CVE-2021-33838

Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because requests related to Check-In State occur shortly after requests for Phone Number Registration.

• CWE-203

• https://github.com/mame82/misc/blob/master/luca_traceIds.mdThird Party Advisory
• https://luca-app.de/securityoverview/properties/objectives.htmlVendor Advisory
• https://www.ccc.de/de/updates/2021/luca-app-ccc-fordert-bundesnotbremseThird Party Advisory
• https://www.youtube.com/playlist?list=PLKuX6iczGb3kuDsm2RFgbmRkTugkR9-UEExploit, Third Party Advisory
• https://github.com/mame82/misc/blob/master/luca_traceIds.mdThird Party Advisory
• https://luca-app.de/securityoverview/properties/objectives.htmlVendor Advisory
• https://www.ccc.de/de/updates/2021/luca-app-ccc-fordert-bundesnotbremseThird Party Advisory
• https://www.youtube.com/playlist?list=PLKuX6iczGb3kuDsm2RFgbmRkTugkR9-UEExploit, Third Party Advisory

Published

Jun 4, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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