CVE-2021-28002

MEDIUM

Textpattern 4.9.0 - Stored Cross-Site Scripting via Excerpt Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-28002. PoCs published by Tushar Vaidya.

AI-analyzed exploit summary This exploit demonstrates a persistent XSS vulnerability in Textpattern CMS 4.9.0-dev by injecting malicious JavaScript into the 'Excerpt' field, which executes when viewed in the articles section.

Description

A persistent cross-site scripting vulnerability was discovered in the Excerpt parameter in Textpattern CMS 4.9.0 which allows remote attackers to execute arbitrary code via a crafted payload entered into the URL field. The vulnerability is triggered by users visiting the 'Articles' page.

Exploits (1)

exploitdb WORKING POC
by Tushar Vaidya · textwebappsphp
https://www.exploit-db.com/exploits/49617

This exploit demonstrates a persistent XSS vulnerability in Textpattern CMS 4.9.0-dev by injecting malicious JavaScript into the 'Excerpt' field, which executes when viewed in the articles section.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Textpattern CMS 4.9.0-dev
Auth required
Prerequisites: Admin access to Textpattern CMS
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/49617
Third Party Advisory x_refsource_misc
https://www.linkedin.com/in/tushar-vaidya-2111s5/

Scores

CVSS v3 5.4
EPSS 0.0107
EPSS Percentile 60.6%
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 4.9.0
Published Aug 19, 2021
Tracked Since Feb 18, 2026