SARA / Free Tools / CVE / CVE-2023-26482

CVE-2023-26482 — Nextcloud server is an open source home cloud implementation

Nextcloud server is an open source home cloud implementation. In affected versions a missing scope validation allowed users to create workflows which are designed to be only available for administrators. Some workflows are designed to be RCE by invoking defined scripts, in order

CVSS
9.1 CRITICAL
EPSS
66.25% (top 1.50%)
CWE
CWE-78
Published
2023-03-30T18:27:17.333Z
Last modified
2025-02-11T18:54:35.797Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

01What is this vulnerability?

Nextcloud server is an open source home cloud implementation. In affected versions a missing scope validation allowed users to create workflows which are designed to be only available for administrators. Some workflows are designed to be RCE by invoking defined scripts, in order to generate PDFs, invoking webhooks or running scripts on the server. Due to this combination depending on the…

02Affected products

VendorProductVersions
nextcloudsecurityadvisories — < 24.0.10, >= 25.0.0, < 25.0.4

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

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

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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