CVE-2026-4420

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 v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://cert.pl/en/posts/2026/04/CVE-2026-4420	Third Party Advisory
https://github.com/bludit/bludit/	Product

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:bludit:bludit:3.17.2:::::::*
	cpe:2.3:a:bludit:bludit:3.18.0:::::::*

History

20 Apr 2026, 16:51

Type	Values Removed	Values Added
CPE		cpe:2.3:a:bludit:bludit:3.17.2:::::::* cpe:2.3:a:bludit:bludit:3.18.0:::::::*
References	~~() https://cert.pl/en/posts/2026/04/CVE-2026-4420 -~~	() https://cert.pl/en/posts/2026/04/CVE-2026-4420 - Third Party Advisory
References	~~() https://github.com/bludit/bludit/ -~~	() https://github.com/bludit/bludit/ - Product
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.4
First Time		Bludit Bludit bludit

07 Apr 2026, 11:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-07 11:16

Updated : 2026-04-20 16:51

NVD link : CVE-2026-4420

Mitre link : CVE-2026-4420

CVE.ORG link : CVE-2026-4420

JSON object : View

Products Affected

bludit

bludit

CWE

CWE-79

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

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