Is CVE-2023-26482 in the CISA KEV catalog?

No. CVE-2023-26482 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-26482?

CVE-2023-26482 has a CVSS v3 base score of 9.0 (CRITICAL).

What is the EPSS score for CVE-2023-26482?

CVE-2023-26482 has an EPSS score of 4.18% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-26482?

Upgrade nextcloud server to 25.0.4 or later.

CVE & CISA-KEV Catalog

CVE-2023-26482

CRITICALEPSS 90th pctl

9.0

CVSS v3

NVD

Description

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.

CWE-78OS Command Injection

How to fix

Remediation Available

nextcloud serverNVD

Affected:>= 25.0.0, < 25.0.4Fixed in:25.0.4CVE-2023-26482derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Exploit Intelligence

4.18%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.