CVE-2021-3355

MEDIUM

LightCMS 1.3.4 - Stored Cross-Site Scripting in Title Field to /admin/SensitiveWords

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-3355. PoCs published by Peithon.

AI-analyzed exploit summary This is a writeup describing a stored XSS vulnerability in LightCMS 1.3.4. The exploit involves injecting malicious JavaScript into the 'exclusive' field via the admin interface, which executes when the page is visited.

Description

A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.

Exploits (1)

exploitdb WRITEUP
by Peithon · textwebappsmultiple
https://www.exploit-db.com/exploits/49598

This is a writeup describing a stored XSS vulnerability in LightCMS 1.3.4. The exploit involves injecting malicious JavaScript into the 'exclusive' field via the admin interface, which executes when the page is visited.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: LightCMS v1.3.4
Auth required
Prerequisites: Admin access to the LightCMS interface
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/eddy8/LightCMS/issues/18
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.html
Exploit, Third Party Advisory x_refsource_misc
https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69b
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/49598

Scores

CVSS v3 5.4
EPSS 0.0728
EPSS Percentile 93.6%
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)
lightcms_project/lightcms 1.3.4
Published Feb 24, 2021
Tracked Since Feb 18, 2026