What is CVE-2021-47964?

CVE-2021-47964 is a high-severity vulnerability in Schlix Cms, classified under Code Injection. CVSS score: 8.8/10. Published 2026-05-15.

How severe is CVE-2021-47964?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Schlix Cms

CVE-2021-47964

Schlix CMS 2.2.6-6 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary PHP code by uploading malicious extension packages through the block manager. Attackers can upload a crafted ZIP fil…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.003 (50.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Schlix Cms — versions 2.2.6-6

Weakness classification (CWE)

CWE-94 — Code Injection

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47964?: CVE-2021-47964 is a high-severity vulnerability in Schlix Cms, classified under Code Injection. CVSS score: 8.8/10. Published 2026-05-15.
How severe is CVE-2021-47964?: High severity. CVSS v3 base score is 8.8 out of 10.