Stored Cross-Site Scripting Vulnerability in Blackcat CMS by BlackCat
CVE-2023-53891

5.1MEDIUM

Key Information:

Vendor

Blackcat-cms

Status
Blackcat Cms
Vendor
CVE Published:
15 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-53891?

Blackcat CMS 1.4 has a stored cross-site scripting vulnerability that permits authenticated users to inject harmful JavaScript code into page content. When other users view the compromised pages, these malicious scripts execute, potentially leading to data theft or session hijacking. This vulnerability underscores the importance of securing input fields from untrusted sources.

Affected Version(s)

Blackcat CMS 1.4

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-2023-53891 - Proof of Concept

References

https://www.exploit-db.com/exploits/51604
exploit
https://blackcat-cms.org/
product
https://www.vulncheck.com/advisories/blackcat-cms-stored-...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mirabbas Ağalarov
JSON
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CVE-2023-53891 : Stored Cross-Site Scripting Vulnerability in Blackcat CMS by BlackCat