High severity7.5NVD Advisory· Published Jun 4, 2021· Updated Jun 17, 2026
CVE-2021-33839
CVE-2021-33839
Description
Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because the QR code of a Public Location can be intentionally confused with the QR code of a Private Meeting.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Luca/Lucadescription
Patches
Vulnerability mechanics
References
4- youtu.be/jWyDfEB0m08nvdExploitThird Party Advisory
- github.com/mame82/misc/blob/master/luca_traceIds.mdnvdThird Party Advisory
- luca-app.de/securityoverview/properties/objectives.htmlnvdVendor Advisory
- twitter.com/patrick_hennig/status/1387738281757061125nvdThird Party Advisory
News mentions
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