Deserialization Vulnerability in CraftCMS vCard Plugin from CraftCMS
CVE-2020-37071

9.3CRITICAL

Key Information:

Vendor

Craftcms

Status
Craftcms
Vendor
CVE Published:
3 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-37071?

The CraftCMS vCard Plugin version 1.0.0 has a deserialization vulnerability that may allow unauthenticated attackers to execute arbitrary PHP code. This exploit is possible through a specially crafted payload that targets the plugin's vCard download functionality, enabling remote code execution. By manipulating the serialized data, threat actors can gain unauthorized access to system resources, highlighting the importance of implementing robust input validation and employing secure coding practices.

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Affected Version(s)

CraftCMS 1.0.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-37071 - Proof of Concept

CVE-2020-37071 - Proof of Concept

References

https://www.exploit-db.com/exploits/48492
exploit
https://craftcms.com/
product
https://plugins.craftcms.com/vcard
product

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wade Guest
JSON
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