CVE-2021-27237

MEDIUM

BlackCat CMS 1.3.6 - Stored Cross-Site Scripting via Display Name Field

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-27237. PoCs published by Kamaljeet Kumar.

AI-analyzed exploit summary This is a writeup describing a stored XSS vulnerability in BlackCat CMS 1.3.6. The exploit involves injecting an XSS payload into the 'Display name' field in the admin profile, which triggers when hovered over.

Description

The admin panel in BlackCat CMS 1.3.6 allows stored XSS (by an admin) via the Display Name field to backend/preferences/ajax_save.php.

Exploits (1)

exploitdb WRITEUP
by Kamaljeet Kumar · textwebappsphp
https://www.exploit-db.com/exploits/49565

This is a writeup describing a stored XSS vulnerability in BlackCat CMS 1.3.6. The exploit involves injecting an XSS payload into the 'Display name' field in the admin profile, which triggers when hovered over.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: BlackCat CMS 1.3.6
Auth required
Prerequisites: Admin access to the BlackCat CMS panel
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/49565

Scores

CVSS v3 4.8
EPSS 0.0096
EPSS Percentile 56.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
blackcat-cms/blackcat_cms 1.3.6
Published Feb 16, 2021
Tracked Since Feb 18, 2026