What is CVE-2023-53950?

CVE-2023-53950 is a critical-severity vulnerability in Innovastudio Wysiwyg Editor, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2025-12-19.

How severe is CVE-2023-53950?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Innovastudio Wysiwyg Editor

CVE-2023-53950

InnovaStudio WYSIWYG Editor 5.4 contains an unrestricted file upload vulnerability that allows attackers to bypass file extension restrictions through filename manipulation. Attackers can upload malicious ASP shells by using null byte techniques and alternate file extensions to circumvent upload controls in the asset manager.

Vulnerability class: Unrestricted File Upload

Published 2025-12-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (49.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000

Affected products

Innovastudio Wysiwyg Editor — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.exploit-db.com/exploits/51362 (exploit)
innovastudio.com (product)
www.vulncheck.com/advisories/innovastudio-wysiwyg-editor-unrestricted-file-uplo… (third-party-advisory)

Frequently asked questions

What is CVE-2023-53950?: CVE-2023-53950 is a critical-severity vulnerability in Innovastudio Wysiwyg Editor, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2025-12-19.
How severe is CVE-2023-53950?: Critical severity. CVSS v3 base score is 9.8 out of 10.