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WS-2022-0136

Date: August 19, 2025

The notification module displaying flash messages unscapes HTML coming from the server, resulting in XSS vulnerabilities with various names and labels of entities (eg. workspace title or media title). This however means you must be a logged in user with respective rights in the first place to leverage the attack vector.

Language: PHP

Severity Score

Related Resources (6)

https://www.neos.io/blog/xss-in-various-backend-modules.html
https://github.com/advisories/GHSA-jfxf-4frr-9j3q
https://discuss.neos.io/t/neos-bugfix-releases-5-3-10-7-0-9-7-1-7-7-2-6-7-3-4-8-0-2/5930?u=kdambekalns
https://github.com/neos/neos-development-collection/security/advisories/GHSA-jfxf-4frr-9j3q
https://github.com/neos/neos
https://www.mend.io/vulnerability-database/WS-2022-0136

Severity Score

Weakness Type (CWE)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-79

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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