Medium severity4.3OSV Advisory· Published Jun 11, 2021· Updated Jun 17, 2026

CVE-2021-22896

Description

Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Nextcloud/MailOSV2 versions
1.6.2, nighly-20170831, nightly-20161202, …+ 1 more
- (no CPE)range: 1.6.2, nighly-20170831, nightly-20161202, …
- (no CPE)range: <1.9.5
osv-coords
pkg:bitnami/nextcloud
Range: < 1.9.5

Patches

Vulnerability mechanics

References

github.com/nextcloud/mail/pull/4864nvdPatchThird Party Advisory
github.com/nextcloud/mail/releases/tag/v1.9.5nvdRelease NotesThird Party Advisory
github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3nvdThird Party Advisory
hackerone.com/reports/1129996nvdThird Party Advisory

News mentions

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cvss	0.280
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000