XSS in various backend modules due to (un)escaping in JS notification module
Impact
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.
Source excerpt · OSVAffected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
| Affected range | Recorded fix |
|---|---|
| From 3.3 before 5.3.10Ecosystem versions | 5.3.10 |
| From 7.0.0 before 7.0.9Ecosystem versions | 7.0.9 |
| From 7.1.0 before 7.1.7Ecosystem versions | 7.1.7 |
| From 7.2.0 before 7.2.6Ecosystem versions | 7.2.6 |
| From 7.3.0 before 7.3.4Ecosystem versions | 7.3.4 |
| From 8.0.0 before 8.0.2Ecosystem versions | 8.0.2 |
Version evidence: OSV · GHSA-jfxf-4frr-9j3q
View original version evidence (193 explicit versions)
Original source description
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.
References
- Security advisory github.com/neos/neos-development-collection/security/advisories/GHSA-jfxf-4frr-9j3q
- Source reference 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
- Source reference github.com/neos/neos
- Source reference www.neos.io/blog/xss-in-various-backend-modules.html