CVE-2021-47738

MEDIUM

CSZ CMS 1.2.7 - Stored Cross-Site Scripting via Private Message User-Agent Header

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47738. PoCs published by Metin Yunus Kandemir.

AI-analyzed exploit summary This exploit demonstrates a persistent XSS vulnerability in CSZ CMS 1.2.7 by injecting malicious JavaScript via the User-Agent header in a private message. When the admin views the message, the payload executes in their browser context.

Description

CSZ CMS 1.2.7 contains a persistent cross-site scripting vulnerability that allows unauthorized users to embed malicious JavaScript in private messages. Attackers can send messages with script payloads in the user-agent header, which will execute when an admin views the message in the backend dashboard.

Exploits (1)

exploitdb WORKING POC
by Metin Yunus Kandemir · textwebappsphp
https://www.exploit-db.com/exploits/48354

This exploit demonstrates a persistent XSS vulnerability in CSZ CMS 1.2.7 by injecting malicious JavaScript via the User-Agent header in a private message. When the admin views the message, the payload executes in their browser context.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: CSZ CMS v1.2.7
Auth required
Prerequisites: Access to a member account · Admin user must view the malicious private message
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory, VDB Entry exploit
https://www.exploit-db.com/exploits/48354
Product product
https://www.cszcms.com/

Scores

CVSS v3 5.4
EPSS 0.0025
EPSS Percentile 15.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
Cszcms/CSZ CMS 1.2.7
cszcms/csz_cms 1.2.7
Published Dec 23, 2025
Tracked Since Feb 18, 2026