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 file containing PHP code in the packageinfo.inc file and trigger execution by accessing the About tab of the installed extension.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (51.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Schlix Cms — versions 2.2.6-6
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49838 (exploit)
- www.schlix.com/ (product)
- www.schlix.com/downloads/schlix-cms/schlix-cms-v2.2.6-6.zip (product)
- www.vulncheck.com/advisories/schlix-cms-6-remote-code-execution-via-core-blockm… (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.