CVE-2023-26482Network attack vector

Authenticated code execution via unchecked workflow scope

Published Mar 30, 2023 · Updated Feb 11, 2025

Command injection in Nextcloud Server before 24.0.10 and 25.0.0 through 25.0.3 allows remote authenticated users to execute code. WorkflowEngine Manager::validateOperation accepted an operation without checking isAvailableForScope against the request's ScopeContext. A low-privileged account, user interaction, and an installed workflow app with command-running operations are required; successful abuse runs server-side commands.

CVSS severity9.0
Critical
EPSS probability4.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Nextcloud Server before 24.0.10 and 25.0.0 through 25.0.3 allows remote authenticated users to execute code. WorkflowEngine Manager::validateOperation accepted an operation without checking isAvailableForScope against the request's ScopeContext. A low-privileged account, user interaction, and an installed workflow app with command-running operations are required; successful abuse runs server-side commands.

The record

CVE
CVE-2023-26482
Published
Mar 30, 2023
Updated
Feb 11, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 24.0.10
  2. Affected versionversion=>= 25.0.0, < 25.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=< 24.0.10; version=>= 25.0.0, < 25.0.4

Published CVSS scores

9.0GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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