What’s Vulnerable › Vulnerabilities

CVE-2021-3355

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-24 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• Lightcms Project Lightcms: 1.3.4

References

• http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.html
• https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69b
• https://github.com/eddy8/LightCMS/issues/18
• https://www.exploit-db.com/exploits/49598
• http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.html
• https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69b
• https://github.com/eddy8/LightCMS/issues/18
• https://www.exploit-db.com/exploits/49598

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