CVE-2023-49791

Workflows do not require password confirmation on API level

MEDIUM

5.4

CVSS Score

Published: December 22, 2023 at 04:26 PM UTC

Updated: June 17, 2026 at 06:36 AM UTC

1 product affected across 1 vendorNextcloud/server

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.6%

SSVC

PoC

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when an attacker manages to get access to an active session of another user via another way, they could delete and modify workflows by sending calls directly to the API bypassing the password confirmation shown in the UI. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nextcloud/server · Nextcloudnextcloud-app

95%

23.0.0 ≤ v < 23.0.12.1324.0.0 ≤ v < 24.0.12.925.0.0 ≤ v < 25.0.13.426.0.0 ≤ v < 26.0.927.0.0 ≤ v < 27.1.4

Affected range stops below 23.0.12.13, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.0.12.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 25.0.13.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.0.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 27.1.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f8p-6qww-2prr

x_refsource_MISCPatch

Source: [email protected]

https://github.com/nextcloud/server/pull/41520

x_refsource_MISCPermissions Required

Source: [email protected]

https://hackerone.com/reports/2120667

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: LOW
Availability: LOW

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-284CWE-287

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