CVE-2023-45151

Name: CVE-2023-45151
Creator: NVD / NIST
Published: 2023-10-16T19:15:10.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2023-45151 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Nextcloud server is an open source home cloud platform. Affected versions of Nextcloud stored OAuth2 tokens in plaintext which allows an attacker who has gained access to the server to potentially elevate their privilege. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

Nextcloud server is an open source home cloud platform. Affected versions of Nextcloud stored OAuth2 tokens in plaintext which allows an attacker who has gained access to the server to potentially elevate their privilege. This issue has been addressed and users are recommended to upgrade their Nextcloud Server to version 25.0.8, 26.0.3 or 27.0.1. There are no known workarounds for this vulnerability.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.48%

38.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	>= 25.0.0, < 25.0.8
Nextcloud	Nextcloud Server	>= 26.0.0, < 26.0.3
Nextcloud	Nextcloud Server	27.0.0

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhgv-jcg9-p4m9Vendor Advisory
https://github.com/nextcloud/server/pull/38398Issue Tracking, Patch
https://hackerone.com/reports/1994324Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhgv-jcg9-p4m9Vendor Advisory
https://github.com/nextcloud/server/pull/38398Issue Tracking, Patch
https://hackerone.com/reports/1994324Permissions Required

Timeline

Published: Oct 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-45151?

How severe is CVE-2023-45151?

CVE-2023-45151 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2023-45151?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-45151?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST