CVE-2021-22877 Information disclosure in Nextcloud Server

What is CVE-2021-22877?

CVE-2021-22877 is a medium-severity vulnerability in Fedoraproject Fedora, published on 3 Mar 2021. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.

Weakness: CWE-862, CWE-284

Which versions are affected by CVE-2021-22877?

It affects 2 products.

Products include Fedoraproject Fedora, Nextcloud Nextcloud Server.

How do I fix CVE-2021-22877?

No fix has been published for CVE-2021-22877 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-22877 being exploited?

There is no known exploitation of CVE-2021-22877 in the wild and no public exploit code.

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• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-v65r-wc6r-r9x8.