CVE-2021-22896
MEDIUMCVSS 4.3/10EPSS 0.99%
Last modified
CVE-2021-22896 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.99% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud | < 1.9.5 |
References
- https://github.com/nextcloud/mail/pull/4864Patch, Third Party Advisory
- https://github.com/nextcloud/mail/releases/tag/v1.9.5Release Notes, Third Party Advisory
- https://hackerone.com/reports/1129996Third Party Advisory
- https://github.com/nextcloud/mail/pull/4864Patch, Third Party Advisory
- https://github.com/nextcloud/mail/releases/tag/v1.9.5Release Notes, Third Party Advisory
- https://hackerone.com/reports/1129996Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-22896?
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.
How severe is CVE-2021-22896?
CVE-2021-22896 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22896?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-22896?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST