What’s Vulnerable › Vulnerabilities

CVE-2020-20391

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-23 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross Site Scripting vulnerability in GetSimpleCMS 3.4.0a in admin/snippets.php via (1) Add Snippet and (2) Save snippets.

Affected products

• GetSimpleCMS: 3.4.0-a1

References

• https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1322
• https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1322

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