CVE-2022-31120 — Nextcloud server is an open source personal cloud solution

Nextcloud server is an open source personal cloud solution. The audit log is used to get a full trail of the actions which has been incompletely populated. In affected versions federated share events were not properly logged which would allow brute force attacks to go unnoticed.

01What is this vulnerability?

Nextcloud server is an open source personal cloud solution. The audit log is used to get a full trail of the actions which has been incompletely populated. In affected versions federated share events were not properly logged which would allow brute force attacks to go unnoticed. This behavior exacerbates the impact of CVE-2022-31118. It is recommended that the Nextcloud Server is upgraded to…

02Affected products

Vendor	Product	Versions
nextcloud	security	advisories — >= 23.0.0, < 23.0.4, < 22.2.7

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2022-08-04T17:00:24.000Z
• Last modified: 2025-04-23T17:53:53.101Z

09References

• github.com — https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9qvg-7…
• github.com — https://github.com/nextcloud/server/pull/31594/commits/1d8bf9a89c6856218802a1d36…
• portal.nextcloud.com — https://portal.nextcloud.com/article/using-the-audit-log-44.html