Nextcloud End-To-End Encryption vulnerabilities

2 CVEs affecting Nextcloud End-To-End Encryption, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-35173, published 2023-06-23.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2021-22906, published 2021-06-11. Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days. Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users.
• CVE-2023-35173, published 2023-06-23. Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days. Nextcloud End-to-end encryption app provides all the necessary APIs to implement End-to-End encryption on the client side. By providing an invalid meta data file, an attacker can make previously…