CSRF Vulnerability in Backdrop CMS Allows Remote Code Execution
CVE-2021-45268

8.8HIGH

Key Information:

Vendor

Backdropcms

Status
Backdrop
Vendor
CVE Published:
3 February 2022

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-45268?

A Cross Site Request Forgery (CSRF) vulnerability exists in Backdrop CMS 1.20, allowing remote attackers to potentially execute arbitrary code on the hosting web server. This can be achieved by uploading a malicious add-on containing a crafted PHP file, but the attack necessitates a session cookie from a high-privileged authenticated user who has the capability to install arbitrary add-ons. The vendor has expressed disagreement with the severity of this issue, emphasizing the need for appropriate user privileges.

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-2021-45268 - Proof of Concept

References

https://www.exploit-db.com/exploits/50323
x_refsource_MISC
https://github.com/V1n1v131r4/CSRF-to-RCE-on-Backdrop-CMS
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.