Vulnerability Description
Bludit is vulnerable to Stored Cross-Site Scripting (XSS) in its page creating functionality. An authenticated attacker with page creation privileges (such as Author, Editor, or Administrator) can embed a malicious JavaScript payload in the tags field of a newly created article. This payload will be executed when a victim visits the URL of the uploaded resource. The uploaded resource itself is accessible without authentication. Critically, this vulnerability could be used to automatically create a new site administrator if the victim has enough privileges. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only versions 3.17.2 and 3.18.0 were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bludit | Bludit | 3.17.2 |
Related Weaknesses (CWE)
References
- https://cert.pl/en/posts/2026/04/CVE-2026-4420Third Party Advisory
- https://github.com/bludit/bludit/Product
FAQ
What is CVE-2026-4420?
CVE-2026-4420 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Bludit is vulnerable to Stored Cross-Site Scripting (XSS) in its page creating functionality. An authenticated attacker with page creation privileges (such as Author, Editor, or Administrator) can emb...
How severe is CVE-2026-4420?
CVE-2026-4420 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4420?
Check the references section above for vendor advisories and patch information. Affected products include: Bludit Bludit.