Deserialization in Craftcms
CVE-2020-37071
CraftCMS 3 vCard Plugin 1.0.0 contains a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary PHP code through a crafted payload. Attackers can generate a malicious serialized payload that triggers remote code execution by exploiting the plugin's vCard download functionality with a specially crafted request.
Vulnerability class: Insecure Deserialization
Published · last modified .
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 (49.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.2% 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
- Craftcms — versions 1.0.0
Weakness classification (CWE)
References
- ExploitDB-48492 (exploit)
- Official CraftCMS Vendor Homepage (product)
- CraftCMS vCard Plugin Page (product)
- Researcher Exploit Disclosure (technical-description, exploit)
- VulnCheck Advisory: CraftCMS 3 vCard Plugin 1.0.0 - Remote Code Execution (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37071?
- CVE-2020-37071 is a critical-severity vulnerability in Craftcms, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-02-03.
- How severe is CVE-2020-37071?
- Critical severity. CVSS v3 base score is 9.8 out of 10.