CVE-2021-32656: Trusted servers exchange can be triggered by attacker
nextcloud · security-advisories
Vendor fix available · Affected: nextcloud security-advisories · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 79% of scored CVEs
DescriptionCVE.org
Nextcloud Server is a Nextcloud package that handles data storage. A vulnerability in federated share exists in versions prior to 19.0.11, 20.0.10, and 21.0.2. An attacker can gain access to basic information about users of a server by accessing a public link that a legitimate server user added as a federated share. This happens because Nextcloud supports sharing registered users with other Nextcloud servers, which can be done automatically when selecting the "Add server automatically once a federated share was created successfully" setting. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2 As a workaround, disable "Add server automatically once a federated share was created successfully" in the Nextcloud settings.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- nextcloud · security-advisories< 19.0.11; >= 20.0.0, < 20.0.10; >= 21.0.0, < 21.0.2
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- nextcloud
- Published
- June 2021
- Bounty reports
- 1 disclosed on HackerOne
Disclosed bug bounty reports about CVE-2021-32656
The reports on HackerOne that name this CVE, with HackerOne's own outcome. Titles and metadata only.
- Trusted servers exchange can be triggered by attackerNextcloud · 2021 · medium severityValid
CoverageNo articles yet
No CyberSIXT article names CVE-2021-32656 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.