High

Neos Information Disclosure Security Note

Disclosed: 17.05.2024
Updated: 11.10.2026 10:22

Due to reports it has been validated that internal workspaces in Neos are accessible without authentication. Some users assumed this is a planned feature but it is not. A workspace preview should be an additional feature with respective security measures in place.

Note that this only allows reading of internal workspaces not writing. And for clarification, an internal workspace is a workspace that is non public and doesn't have an owner.

Given that an internal workspace exists in your installation, it is possible to view a page in context of that workspace by opening a link in this format:

https://domain/path/to/page.html@workspace-name

The issue is quite problematic when exploited but at the same time slightly less impactful than it sounds. First of all there is no default internal workspace, so the issue affects only workspaces created by users. That also means the workspace-name, which will also always include a hash is individual to a project and an exploiter must get hold of the workspace-name including the hash. This is non trivial as there is no indication of the existence of it, but obviously brute force and educated guessed can be made.

Affected software

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Platform	Package	Vulnerable versions	Fixed in
Composer package	neos/neos	>= 2.3.0, < 3.0.20, >= 3.1.0, < 3.1.18, >= 3.2.0, < 3.2.14, >= 3.3.0, < 3.3.23, >= 4.0.0, < 4.0.17, >= 4.1.0, < 4.1.16, >= 4.2.0, < 4.2.12, >= 4.3.0, < 4.3.3	3.0.20, 3.1.18, 3.2.14, 3.3.23, 4.0.17, 4.1.16, 4.2.12, 4.3.3

References

CVSS score 7.5/10

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): -
Platform: Composer
Package: neos/neos
Disclosed: 17.05.2024
Updated: 11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-3c5g-73f7-grvm - CC BY 4.0

Vulnerability history: neos/neos

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries: 5
First → latest: 05.2022 05.2024
Without a fix: 0
Exploited in attacks: 0

Severity breakdown

High 2
Medium 3

Disclosures per year

2022: 2
2023: 0
2024: 3
2025: 0
2026: 0

17.05.2024

Cross-site Scripting vulnerabilities in Neos

High ghsa-6cj3-rc4p-f38f >= 1.2.0, < 1.2.13, >= 2.0.0, < 2.0.4 1.2.13, 2.0.4
17.05.2024

Privilege Escalation in TYPO3 Neos

Medium · 4.2 ghsa-43cf-7f3h-38rg >= 1.1.0, < 1.1.3, >= 1.2.0, < 1.2.3 1.1.3, 1.2.3
17.05.2024

Neos Information Disclosure Security Note this entry

High · 7.5 ghsa-3c5g-73f7-grvm >= 2.3.0, < 3.0.20, >= 3.1.0, < 3.1.18, >= 3.2.0, < 3.2.14, >= 3.3.0, < 3.3.23, >= 4.0.0, < 4.0.17, >= 4.1.0, < 4.1.16, >= 4.2.0, < 4.2.12, >= 4.3.0, < 4.3.3 3.0.20, 3.1.18, 3.2.14, 3.3.23, 4.0.17, 4.1.16, 4.2.12, 4.3.3
03.06.2022

Neos CMS vulnerable to XSS in various backend modules

Medium · 5.4 CVE-2022-30429 >= 3.3.0, < 4.4.0, >= 5.3.0, < 5.3.10, >= 7.0.0, < 7.0.9, >= 7.1.0, < 7.1.7, >= 7.2.0, < 7.2.6, >= 7.3.0, < 7.3.4, >= 8.0.0, < 8.0.2 4.4.0, 5.3.10, 7.0.9, 7.1.7, 7.2.6, 7.3.4, 8.0.2
25.05.2022

XSS in various backend modules due to (un)escaping in JS notification module

Medium ghsa-jfxf-4frr-9j3q >= 3.3, < 5.3.10, >= 7.0.0, < 7.0.9, >= 7.1.0, < 7.1.7, >= 7.2.0, < 7.2.6, >= 7.3.0, < 7.3.4, >= 8.0.0, < 8.0.2 5.3.10, 7.0.9, 7.1.7, 7.2.6, 7.3.4, 8.0.2

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