CVE-2021-28001

MEDIUM

Textpattern CMS 4.8.4 - Stored Cross-Site Scripting via Comments Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-28001. PoCs published by Tushar Vaidya.

AI-analyzed exploit summary This exploit demonstrates a persistent XSS vulnerability in Textpattern CMS 4.8.4 by injecting malicious JavaScript into the 'Comments' section via the URL field. The payload executes when a user visits the affected page.

Description

A cross-site scripting vulnerability was discovered in the Comments parameter in Textpattern CMS 4.8.4 which allows remote attackers to execute arbitrary code via a crafted payload entered into the URL field. The vulnerability is triggered by users visiting https://site.com/articles/welcome-to-your-site#comments-head.

Exploits (1)

exploitdb WORKING POC
by Tushar Vaidya · textwebappsphp
https://www.exploit-db.com/exploits/49616

This exploit demonstrates a persistent XSS vulnerability in Textpattern CMS 4.8.4 by injecting malicious JavaScript into the 'Comments' section via the URL field. The payload executes when a user visits the affected page.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Textpattern CMS v4.8.4
Auth required
Prerequisites: Admin access to Textpattern CMS · Comments section enabled
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/49616

Scores

CVSS v3 5.4
EPSS 0.0102
EPSS Percentile 58.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
textpattern/textpattern 4.8.4
Published Aug 19, 2021
Tracked Since Feb 18, 2026