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Case File

CVE-2021-3355

MEDIUM · CVSS 5.4 EPSS 7.25% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-24 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.4. It affects Java. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
gist.github.com ↗ github.com ↗
External Security References
packetstormsecurity.com ↗ exploit-db.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-3355
Severity
MEDIUM
CVSS
5.4
EPSS
7.25%
Java

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-29934 MEDIUM CVE-2024-22559 MEDIUM CVE-2023-27060 CRITICAL CVE-2022-33009 MEDIUM CVE-2021-27112 CRITICAL