CVE-2023-26482
high-risk
Published 2023-03-30
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 available apps the issue can result in a RCE at the end. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. Users unable to upgrade should disable app `workflow_scripts` and `workflow_pdf_converter` as a mitigation.
Do I need to act?
!
52.2% chance of exploitation in next 30 days
EPSS score — higher than 48% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.0/10
Critical
NETWORK
/ LOW complexity
Affected Products (2)
Affected Vendors
References (4)
55
/ 100
high-risk
Severity
30/34 · Critical
Exploitability
18/34 · Moderate
Exposure
7/34 · Low