Skip to main content
Public proof of conceptFix available

CVE-2023-26482

A public proof of concept exists; no exploitation attested.

  • Published2023-03-30
  • Fixed in25.0.4 · 24.0.10 · 23.0.12.5 · 22.2.10.10 · 21.0.9.10 · 20.0.14.12
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2023-03-3019:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-26482?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-26482?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Nextcloud nextcloud server
BranchAffectedFixed in
25.0≥ 25.0.0, < 25.0.425.0.4
24.0≥ 24.0.0, < 24.0.1024.0.10
23.0≥ 23.0.0, < 23.0.12.523.0.12.5
22.x≥ 22.0.0, < 22.2.10.1022.2.10.10
21.0≥ 21.0.0, < 21.0.9.1021.0.9.10
20.0≥ 18.0.0, < 20.0.14.1220.0.14.12

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • nextcloud security-advisories
    Affected
    • = < 24.0.10no fix stated
    • = >= 25.0.0, < 25.0.4no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-03-30

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

Full record on NVD

Fix

  1. Update Nextcloud nextcloud server to 25.0.4 · 24.0.10 · 23.0.12.5 · 22.2.10.10 · 21.0.9.10 · 20.0.14.12

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedISabbiI/PoC---CVE-2023-26482-RCE-LAB-Nextcloud
PoC-in-GitHub
Metasploit modules
1 moduleexploit/unix/webapp/nextcloud_workflows_rcerank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-03-30
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2023-26482?

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.

Is CVE-2023-26482 actively exploited?

Active exploitation of CVE-2023-26482 has not been confirmed. Its EPSS score was 4.2% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

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

CVE-2023-26482 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Running nextcloud? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record