CVE-2023-26482

highpriority · attend · 46EPSS 0.042 · 91 %ileexploit · weaponizedDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · weaponized

Likely / severe?

4.18% (91st) EPSS

CVSS 8.8 · high

Is it mine?

21 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.6–9.1

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:Hsecondary · security-advisories@github.comexploitability 2.3 · impact 6

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Fsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-78USCWE-78US

exploits (2)

Public proof-of-concept and weaponised exploit code.

exploit/unix/webapp/nextcloud_workflows_rceNextcloud Workflows Remote Code Executionweaponized · metasploit
ISabbiI/PoC---CVE-2023-26482-RCE-LAB-NextcloudISabbiI/PoC---CVE-2023-26482-RCE-LAB-NextcloudPoC · poc_in_github

affected products (21)

Products and version ranges known to be affected.

Nextcloud Nextcloud <24.0.10 Serverall versionscert_bundDE
Nextcloud Nextcloud <25.0.4 Serverall versionscert_bundDE
nextcloud nextcloud< 24.0.10 Servercert_bundDE
nextcloud nextcloud< 25.0.4 Servercert_bundDE
nextcloud security-advisories≤ < 24.0.10enisa_euvdEU
nextcloud security-advisories25.0.0, → 25.0.4enisa_euvdEU
Nextcloud GmbH Nextcloud Enterprise Server18.0.0 → 20.0.14.12fstec_bduRU
Nextcloud GmbH Nextcloud Enterprise Server21.0.0 → 21.09.10fstec_bduRU
Nextcloud GmbH Nextcloud Enterprise Server22.0.0 → 22.2.10.10fstec_bduRU
Nextcloud GmbH Nextcloud Enterprise Server23.0.0 → 23.0.12.5fstec_bduRU
Nextcloud GmbH Nextcloud Enterprise Server24.0.0 → 24.0.10fstec_bduRU
Nextcloud GmbH Nextcloud Enterprise Server25.0.0 → 25.0.4fstec_bduRU
Nextcloud GmbH Nextcloud Server24.0.0 → 24.0.10fstec_bduRU
Nextcloud GmbH Nextcloud Server25.0.0 → 25.0.4fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
nextcloud nextcloud server18.0.0 → 20.0.14.12nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
nextcloud nextcloud server21.0.0 → 21.0.9.10nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
nextcloud nextcloud server22.0.0 → 22.2.10.10nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
nextcloud nextcloud server23.0.0 → 23.0.12.5nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
nextcloud nextcloud server24.0.0 → 24.0.10nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*

showing 20 of 21

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0824Nextcloud: Mehrere SchwachstellenDeutsch2023-04-02csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um beliebigen Programmcode auszuführen oder Informationen offenzulegen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2023-03-30modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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