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CVE-2026-4420

MEDIUM CVSS 4.0: 5.1 EPSS 0.12%
Updated Apr 07, 2026
Payload
Parameter Value
CVSS 5.1 (MEDIUM)
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Payload
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
Passive
Minimal interaction

Impact Assessment

Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v4.0