CVE-2021-22906

MEDIUM 6.5CVE-2021-22906 · Published 11/06/2021 · updated 17/06/2026

In short

CVE-2021-22906 is a MEDIUM (CVSS 6.5) vulnerability affecting end-to-end encryption (nextcloud).
Chance of exploitation in the next 30 days (EPSS): 0.72%, higher than 54.0% of all vulnerabilities.
Fix: update to 1.6.3, 1.7.1, 1.5.3 or later.

Package	Affected versions	Patched versions
end-to-end encryption nextcloud	`≥ 1.6.0, < 1.6.3≥ 1.7.0, < 1.7.1< 1.5.3`	`1.6.31.7.11.5.3`

Description

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.

References

nextcloud/security-advisories security advisory · Third Party Advisory
hackerone.com/reports/1189174 · Exploit

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