CVE-2026-4420
mediumpriority · track · 22EPSS 0.002 · 5 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.2–5.4
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://cert.pl/en/posts/2026/04/CVE-2026-4420cnnvd
- https://github.com/bludit/bludit/cnnvd
- https://www.bludit.com/Patchcnnvd
- https://cert.pl/en/posts/2026/04/CVE-2026-4420enisa_euvd
- https://github.com/bludit/bludit/enisa_euvd
- https://cert.pl/en/posts/2026/04/CVE-2026-4420Third Party Advisorynvd
- https://github.com/bludit/bludit/Productnvd
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